{"title":"Switches and Safety Sensors - Dometic","description":"\u003ch3 data-start=\"1702\" data-end=\"1715\"\u003eThis Category Includes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1718\" data-end=\"1731\"\u003eSail Switch\u003c\/li\u003e\n\u003cli data-start=\"1734\" data-end=\"1755\"\u003eLow Air Flow Switch\u003c\/li\u003e\n\u003cli data-start=\"1758\" data-end=\"1775\"\u003eHi\/Limit Switch\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"dometic-atwood-dfsd-furnace-sail-switch-part-36160-replaces-33081","title":"Dometic (Atwood) DFSD Furnace Sail Switch – Part #36160 (Replaces 33081)","description":"\u003cp data-start=\"77\" data-end=\"494\"\u003eRestore reliable safety sensing and improve furnace performance with the \u003cstrong data-start=\"150\" data-end=\"209\"\u003eDometic (Atwood) DFSD Furnace Sail Switch – Part #36160\u003c\/strong\u003e. Designed as an exact replacement for OEM part #36160 and superseding part #33081, this high-quality sail switch ensures proper airflow detection in your RV furnace — a critical safety component that tells the control board when sufficient airflow is present before allowing ignition.\u003c\/p\u003e\n\u003cp data-start=\"496\" data-end=\"717\"\u003eA failing or stuck sail switch is a common cause of \u003cstrong data-start=\"548\" data-end=\"634\"\u003e“furnace starts then shuts off,” “furnace won’t ignite,” or “fan runs but no heat”\u003c\/strong\u003e conditions. Replace it with this genuine fit part to restore dependable operation.\u003c\/p\u003e\n\u003chr data-start=\"719\" data-end=\"722\"\u003e\n\u003ch3 data-start=\"724\" data-end=\"742\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"746\" data-end=\"781\"\u003e\u003cstrong data-start=\"746\" data-end=\"779\"\u003eOEM Replacement – Part #36160\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"784\" data-end=\"812\"\u003eReplaces older part #33081\u003c\/li\u003e\n\u003cli data-start=\"815\" data-end=\"867\"\u003eEnsures accurate airflow sensing for safe ignition\u003c\/li\u003e\n\u003cli data-start=\"870\" data-end=\"925\"\u003ePrecision contacts and switch diaphragm for long life\u003c\/li\u003e\n\u003cli data-start=\"928\" data-end=\"996\"\u003eDesigned to meet factory specifications for performance and safety\u003c\/li\u003e\n\u003cli data-start=\"999\" data-end=\"1037\"\u003eDirect fit — no modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1039\" data-end=\"1042\"\u003e\n\u003ch3 data-start=\"1044\" data-end=\"1079\"\u003eWhy Replace Your Sail Switch\u003c\/h3\u003e\n\u003cp data-start=\"1081\" data-end=\"1271\"\u003eThe sail switch (also called an airflow or pressure switch) tells the furnace control board that the blower is moving enough air for safe operation. When it fails or sticks, the furnace may:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1275\" data-end=\"1308\"\u003eStart then shut off prematurely\u003c\/li\u003e\n\u003cli data-start=\"1311\" data-end=\"1327\"\u003eFail to ignite\u003c\/li\u003e\n\u003cli data-start=\"1330\" data-end=\"1367\"\u003eShow error codes related to airflow\u003c\/li\u003e\n\u003cli data-start=\"1370\" data-end=\"1409\"\u003eRun the blower without producing heat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1411\" data-end=\"1524\"\u003eReplacing a worn or faulty sail switch is one of the most effective repairs for common RV furnace airflow issues.\u003c\/p\u003e\n\u003chr data-start=\"1526\" data-end=\"1529\"\u003e\n\u003ch3 data-start=\"1531\" data-end=\"1577\"\u003eCompatible Models \u0026amp; Serial Requirements\u003c\/h3\u003e\n\u003cp data-start=\"1579\" data-end=\"1733\"\u003eThis replacement sail switch is compatible with the following \u003cstrong data-start=\"1641\" data-end=\"1679\"\u003eDometic \/ Atwood RV furnace models\u003c\/strong\u003e when the furnace Serial Number is \u003cstrong data-start=\"1714\" data-end=\"1732\"\u003eAFTER 72498929\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp data-start=\"1735\" data-end=\"1958\"\u003e\u003cstrong data-start=\"1735\" data-end=\"1773\"\u003eDometic \/ Atwood AFS \u0026amp; AFSD Series\u003c\/strong\u003e\u003cbr data-start=\"1773\" data-end=\"1776\"\u003eAFSAD12111, AFSD12111, AFSD16111, AFSD20111\u003cbr data-start=\"1819\" data-end=\"1822\"\u003eAFSDA12121, AFSAD12121, AFSD16121, AFSD20121\u003cbr data-start=\"1866\" data-end=\"1869\"\u003eAFSAD12131, AFSD12131, AFSD16131, AFSD20131\u003cbr data-start=\"1912\" data-end=\"1915\"\u003eAFSAD12141, AFSD12141, AFSD16141, AFSD20141\u003c\/p\u003e\n\u003cp data-start=\"1960\" data-end=\"2104\"\u003e\u003cstrong data-start=\"1960\" data-end=\"1992\"\u003eDometic \/ Atwood AFMD Series\u003c\/strong\u003e\u003cbr data-start=\"1992\" data-end=\"1995\"\u003eAFMD16111, AFMD16121, AFMD16131, AFMD16141, AFMD16151\u003cbr data-start=\"2048\" data-end=\"2051\"\u003eAFMD20111, AFMD20121, AFMD20131, AFMD20141, AFMD20151\u003c\/p\u003e\n\u003cp data-start=\"2106\" data-end=\"2363\"\u003e\u003cstrong data-start=\"2106\" data-end=\"2146\"\u003eDometic \/ Atwood DFSD \u0026amp; DFSAD Series\u003c\/strong\u003e\u003cbr data-start=\"2146\" data-end=\"2149\"\u003eDFSAD12111, DFSAD12121, DFSAD12131, DFSAD12141\u003cbr data-start=\"2195\" data-end=\"2198\"\u003eDFSD12111, DFSD12121, DFSD12131, DFSD12141, DFSD12151\u003cbr data-start=\"2251\" data-end=\"2254\"\u003eDFSD16111, DFSD16121, DFSD16131, DFSD16141, DFSD16151\u003cbr data-start=\"2307\" data-end=\"2310\"\u003eDFSD20111, DFSD20121, DFSD20131, DFSD20141, DFSD20151\u003c\/p\u003e\n\u003cp data-start=\"2365\" data-end=\"2551\"\u003e\u003cstrong data-start=\"2368\" data-end=\"2382\"\u003eImportant:\u003c\/strong\u003e Verify your furnace Serial Number is \u003cem data-start=\"2420\" data-end=\"2436\"\u003eafter 72498929\u003c\/em\u003e before ordering — this sail switch is designed for updated control board configurations used in these newer units.\u003c\/p\u003e\n\u003chr data-start=\"2553\" data-end=\"2556\"\u003e\n\u003ch3 data-start=\"2558\" data-end=\"2580\"\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2584\" data-end=\"2615\"\u003e(1) Sail Switch – Part #36160\u003c\/li\u003e\n\u003cli data-start=\"2618\" data-end=\"2660\"\u003eMounting bracket and terminals as required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2662\" data-end=\"2715\"\u003e\u003cem data-start=\"2662\" data-end=\"2715\"\u003eWire harness and other connections sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr data-start=\"2717\" data-end=\"2720\"\u003e\n\u003ch2 data-start=\"2722\" data-end=\"2753\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp data-start=\"2755\" data-end=\"2960\"\u003e\u003cstrong data-start=\"2755\" data-end=\"2803\"\u003eWhat does a sail switch do in an RV furnace?\u003c\/strong\u003e\u003cbr data-start=\"2803\" data-end=\"2806\"\u003eIt detects airflow from the blower — only allowing the furnace to continue ignition when sufficient air is flowing, ensuring safe and efficient operation.\u003c\/p\u003e\n\u003cp data-start=\"2962\" data-end=\"3176\"\u003e\u003cstrong data-start=\"2962\" data-end=\"2992\"\u003eCan I install this myself?\u003c\/strong\u003e\u003cbr data-start=\"2992\" data-end=\"2995\"\u003eYes — basic RV furnace repairs like sail switch replacement can be done with common tools. Always disconnect propane and power before servicing and follow manufacturer instructions.\u003c\/p\u003e\n\u003cp data-start=\"3178\" data-end=\"3373\"\u003e\u003cstrong data-start=\"3178\" data-end=\"3231\"\u003eHow do I know my furnace needs a new sail switch?\u003c\/strong\u003e\u003cbr data-start=\"3231\" data-end=\"3234\"\u003eSymptoms include the furnace running the blower but never igniting, cycling on and off quickly, or error codes indicating airflow problems.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47821932101873,"sku":null,"price":22.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/361602.jpg?v=1771804724"},{"product_id":"dometic-atwood-31091-furnace-limit-switch","title":"Dometic \/ Atwood 31091 Furnace Limit Switch","description":"\u003ch2 data-start=\"211\" data-end=\"259\"\u003eDometic \/ Atwood 31091 Furnace Limit Switch\u003c\/h2\u003e\n\u003cp data-start=\"260\" data-end=\"287\"\u003e\u003cstrong data-start=\"260\" data-end=\"287\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"289\" data-end=\"402\"\u003e\u003cstrong data-start=\"289\" data-end=\"305\"\u003ePart Number:\u003c\/strong\u003e 31091\u003cbr data-start=\"311\" data-end=\"314\"\u003e\u003cstrong data-start=\"314\" data-end=\"331\"\u003eProduct Type:\u003c\/strong\u003e Furnace Limit Switch\u003cbr data-start=\"352\" data-end=\"355\"\u003e\u003cstrong data-start=\"355\" data-end=\"371\"\u003eApplication:\u003c\/strong\u003e Atwood \u0026amp; Dometic RV Furnaces\u003c\/p\u003e\n\u003chr data-start=\"404\" data-end=\"407\"\u003e\n\u003ch3 data-start=\"409\" data-end=\"429\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp data-start=\"431\" data-end=\"718\"\u003eThe \u003cstrong data-start=\"435\" data-end=\"482\"\u003eDometic \/ Atwood 31091 Furnace Limit Switch\u003c\/strong\u003e is a genuine OEM safety component designed to protect your RV furnace from overheating. The limit switch monitors internal furnace temperature and automatically shuts off the burner circuit if temperatures exceed safe operating limits.\u003c\/p\u003e\n\u003cp data-start=\"720\" data-end=\"955\"\u003eIf your furnace is cycling improperly, shutting down unexpectedly, or failing to stay lit, a faulty limit switch may be the cause. Replacing it with OEM Part 31091 restores safe operation and prevents potential heat damage to the unit.\u003c\/p\u003e\n\u003cp data-start=\"957\" data-end=\"1153\"\u003eManufactured to original equipment specifications, this high-limit switch ensures accurate temperature response and dependable performance across a wide range of Atwood and Dometic furnace models.\u003c\/p\u003e\n\u003chr data-start=\"1155\" data-end=\"1158\"\u003e\n\u003ch3 data-start=\"1160\" data-end=\"1176\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1180\" data-end=\"1227\"\u003eGenuine OEM Dometic \/ Atwood replacement part\u003c\/li\u003e\n\u003cli data-start=\"1230\" data-end=\"1256\"\u003eHigh-limit safety switch\u003c\/li\u003e\n\u003cli data-start=\"1259\" data-end=\"1289\"\u003eProtects against overheating\u003c\/li\u003e\n\u003cli data-start=\"1292\" data-end=\"1356\"\u003eAutomatically interrupts burner circuit at unsafe temperatures\u003c\/li\u003e\n\u003cli data-start=\"1359\" data-end=\"1401\"\u003eDirect OEM replacement for listed models\u003c\/li\u003e\n\u003cli data-start=\"1404\" data-end=\"1443\"\u003eBuilt to original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1445\" data-end=\"1448\"\u003e\n\u003ch2 data-start=\"1450\" data-end=\"1478\"\u003eCompatible Furnace Models\u003c\/h2\u003e\n\u003cp data-start=\"1480\" data-end=\"1543\"\u003ePart \u003cstrong data-start=\"1485\" data-end=\"1494\"\u003e31091\u003c\/strong\u003e is compatible with the following furnace series:\u003c\/p\u003e\n\u003chr data-start=\"1545\" data-end=\"1548\"\u003e\n\u003ch3 data-start=\"1550\" data-end=\"1565\"\u003eAFLA Series\u003c\/h3\u003e\n\u003cp data-start=\"1566\" data-end=\"1637\"\u003eAFLA35211\u003cbr data-start=\"1575\" data-end=\"1578\"\u003eAFLA35221\u003cbr data-start=\"1587\" data-end=\"1590\"\u003eAFLA35231\u003cbr data-start=\"1599\" data-end=\"1602\"\u003eAFLA40211\u003cbr data-start=\"1611\" data-end=\"1614\"\u003eAFLA40221\u003cbr data-start=\"1623\" data-end=\"1626\"\u003eAFLA40231\u003c\/p\u003e\n\u003chr data-start=\"1639\" data-end=\"1642\"\u003e\n\u003ch3 data-start=\"1644\" data-end=\"1659\"\u003eAFLD Series\u003c\/h3\u003e\n\u003cp data-start=\"1660\" data-end=\"1731\"\u003eAFLD35111\u003cbr data-start=\"1669\" data-end=\"1672\"\u003eAFLD35121\u003cbr data-start=\"1681\" data-end=\"1684\"\u003eAFLD35131\u003cbr data-start=\"1693\" data-end=\"1696\"\u003eAFLD40111\u003cbr data-start=\"1705\" data-end=\"1708\"\u003eAFLD40121\u003cbr data-start=\"1717\" data-end=\"1720\"\u003eAFLD40131\u003c\/p\u003e\n\u003chr data-start=\"1733\" data-end=\"1736\"\u003e\n\u003ch3 data-start=\"1738\" data-end=\"1753\"\u003eAFMD Series\u003c\/h3\u003e\n\u003cp data-start=\"1754\" data-end=\"2033\"\u003eAFMD16111, AFMD16121, AFMD16131, AFMD16141, AFMD16151\u003cbr data-start=\"1807\" data-end=\"1810\"\u003eAFMD20111, AFMD20121, AFMD20131, AFMD20141, AFMD20151\u003cbr data-start=\"1863\" data-end=\"1866\"\u003eAFMD25111, AFMD25121, AFMD25131, AFMD25141, AFMD25151\u003cbr data-start=\"1919\" data-end=\"1922\"\u003eAFMD30111, AFMD30121, AFMD30131, AFMD30141, AFMD30151\u003cbr data-start=\"1975\" data-end=\"1978\"\u003eAFMD35111, AFMD35121, AFMD35131, AFMD35141, AFMD35151\u003c\/p\u003e\n\u003chr data-start=\"2035\" data-end=\"2038\"\u003e\n\u003ch3 data-start=\"2040\" data-end=\"2056\"\u003eAFSAD Series\u003c\/h3\u003e\n\u003cp data-start=\"2057\" data-end=\"2108\"\u003eAFSAD12111\u003cbr data-start=\"2067\" data-end=\"2070\"\u003eAFSAD12121\u003cbr data-start=\"2080\" data-end=\"2083\"\u003eAFSAD12131\u003cbr data-start=\"2093\" data-end=\"2096\"\u003eAFSAD12141\u003c\/p\u003e\n\u003chr data-start=\"2110\" data-end=\"2113\"\u003e\n\u003ch3 data-start=\"2115\" data-end=\"2130\"\u003eAFSD Series\u003c\/h3\u003e\n\u003cp data-start=\"2131\" data-end=\"2265\"\u003eAFSD12111, AFSD12121, AFSD12131, AFSD12141\u003cbr data-start=\"2173\" data-end=\"2176\"\u003eAFSD16111, AFSD16121, AFSD16131, AFSD16141\u003cbr data-start=\"2218\" data-end=\"2221\"\u003eAFSD20111, AFSD20121, AFSD20131, AFSD20141\u003c\/p\u003e\n\u003chr data-start=\"2267\" data-end=\"2270\"\u003e\n\u003ch3 data-start=\"2272\" data-end=\"2288\"\u003eAFSDA Series\u003c\/h3\u003e\n\u003cp data-start=\"2289\" data-end=\"2301\"\u003eAFSDA12121\u003c\/p\u003e\n\u003chr data-start=\"2303\" data-end=\"2306\"\u003e\n\u003ch3 data-start=\"2308\" data-end=\"2323\"\u003eDFLA Series\u003c\/h3\u003e\n\u003cp data-start=\"2324\" data-end=\"2395\"\u003eDFLA35211\u003cbr data-start=\"2333\" data-end=\"2336\"\u003eDFLA35221\u003cbr data-start=\"2345\" data-end=\"2348\"\u003eDFLA35231\u003cbr data-start=\"2357\" data-end=\"2360\"\u003eDFLA40211\u003cbr data-start=\"2369\" data-end=\"2372\"\u003eDFLA40221\u003cbr data-start=\"2381\" data-end=\"2384\"\u003eDFLA40231\u003c\/p\u003e\n\u003chr data-start=\"2397\" data-end=\"2400\"\u003e\n\u003ch3 data-start=\"2402\" data-end=\"2417\"\u003eDFLD Series\u003c\/h3\u003e\n\u003cp data-start=\"2418\" data-end=\"2489\"\u003eDFLD35111\u003cbr data-start=\"2427\" data-end=\"2430\"\u003eDFLD35121\u003cbr data-start=\"2439\" data-end=\"2442\"\u003eDFLD35131\u003cbr data-start=\"2451\" data-end=\"2454\"\u003eDFLD40111\u003cbr data-start=\"2463\" data-end=\"2466\"\u003eDFLD40121\u003cbr data-start=\"2475\" data-end=\"2478\"\u003eDFLD40131\u003c\/p\u003e\n\u003chr data-start=\"2491\" data-end=\"2494\"\u003e\n\u003ch3 data-start=\"2496\" data-end=\"2511\"\u003eDFMD Series\u003c\/h3\u003e\n\u003cp data-start=\"2512\" data-end=\"2791\"\u003eDFMD16111, DFMD16121, DFMD16131, DFMD16141, DFMD16151\u003cbr data-start=\"2565\" data-end=\"2568\"\u003eDFMD20111, DFMD20121, DFMD20131, DFMD20141, DFMD20151\u003cbr data-start=\"2621\" data-end=\"2624\"\u003eDFMD25111, DFMD25121, DFMD25131, DFMD25141, DFMD25151\u003cbr data-start=\"2677\" data-end=\"2680\"\u003eDFMD30111, DFMD30121, DFMD30131, DFMD30141, DFMD30151\u003cbr data-start=\"2733\" data-end=\"2736\"\u003eDFMD35111, DFMD35121, DFMD35131, DFMD35141, DFMD35151\u003c\/p\u003e\n\u003chr data-start=\"2793\" data-end=\"2796\"\u003e\n\u003ch3 data-start=\"2798\" data-end=\"2814\"\u003eDFMDH Series\u003c\/h3\u003e\n\u003cp data-start=\"2815\" data-end=\"2892\"\u003eDFMDH25111\u003cbr data-start=\"2825\" data-end=\"2828\"\u003eDFMDH25121\u003cbr data-start=\"2838\" data-end=\"2841\"\u003eDFMDH30111\u003cbr data-start=\"2851\" data-end=\"2854\"\u003eDFMDH30121\u003cbr data-start=\"2864\" data-end=\"2867\"\u003eDFMDH35111\u003cbr data-start=\"2877\" data-end=\"2880\"\u003eDFMDH35121\u003c\/p\u003e\n\u003chr data-start=\"2894\" data-end=\"2897\"\u003e\n\u003ch3 data-start=\"2899\" data-end=\"2915\"\u003eDFSAD Series\u003c\/h3\u003e\n\u003cp data-start=\"2916\" data-end=\"2967\"\u003eDFSAD12111\u003cbr data-start=\"2926\" data-end=\"2929\"\u003eDFSAD12121\u003cbr data-start=\"2939\" data-end=\"2942\"\u003eDFSAD12131\u003cbr data-start=\"2952\" data-end=\"2955\"\u003eDFSAD12141\u003c\/p\u003e\n\u003chr data-start=\"2969\" data-end=\"2972\"\u003e\n\u003ch3 data-start=\"2974\" data-end=\"2989\"\u003eDFSD Series\u003c\/h3\u003e\n\u003cp data-start=\"2990\" data-end=\"3124\"\u003eDFSD12111, DFSD12121, DFSD12131, DFSD12141\u003cbr data-start=\"3032\" data-end=\"3035\"\u003eDFSD16111, DFSD16121, DFSD16131, DFSD16141\u003cbr data-start=\"3077\" data-end=\"3080\"\u003eDFSD20111, DFSD20121, DFSD20131, DFSD20141\u003c\/p\u003e\n\u003chr data-start=\"3126\" data-end=\"3129\"\u003e\n\u003ch3 data-start=\"3131\" data-end=\"3147\"\u003eDFSDH Series\u003c\/h3\u003e\n\u003cp data-start=\"3148\" data-end=\"3173\"\u003eDFSDH20111\u003cbr data-start=\"3158\" data-end=\"3161\"\u003eDFSDH20121\u003c\/p\u003e\n\u003chr data-start=\"3175\" data-end=\"3178\"\u003e\n\u003cblockquote data-start=\"3180\" data-end=\"3262\"\u003e\n\u003cp data-start=\"3182\" data-end=\"3262\"\u003eAlways verify your furnace model number before ordering to ensure compatibility.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"3264\" data-end=\"3267\"\u003e\n\u003ch2 data-start=\"3269\" data-end=\"3313\"\u003eWhen Should You Replace the Limit Switch?\u003c\/h2\u003e\n\u003cp data-start=\"3315\" data-end=\"3370\"\u003eYou may need to replace the limit switch if you notice:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"3374\" data-end=\"3420\"\u003eFurnace shutting down shortly after ignition\u003c\/li\u003e\n\u003cli data-start=\"3423\" data-end=\"3471\"\u003eFurnace blower running but no burner operation\u003c\/li\u003e\n\u003cli data-start=\"3474\" data-end=\"3498\"\u003eRepeated short cycling\u003c\/li\u003e\n\u003cli data-start=\"3501\" data-end=\"3555\"\u003eDiagnostic testing confirms failed high-limit switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3557\" data-end=\"3661\"\u003eThe limit switch is a critical safety device and should be replaced with an OEM specification component.\u003c\/p\u003e\n\u003chr data-start=\"3663\" data-end=\"3666\"\u003e\n\u003ch3 data-start=\"3668\" data-end=\"3694\"\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"3698\" data-end=\"3734\"\u003e\n\u003cstrong data-start=\"3698\" data-end=\"3715\"\u003eManufacturer:\u003c\/strong\u003e Dometic \/ Atwood\u003c\/li\u003e\n\u003cli data-start=\"3737\" data-end=\"3761\"\u003e\n\u003cstrong data-start=\"3737\" data-end=\"3753\"\u003ePart Number:\u003c\/strong\u003e 31091\u003c\/li\u003e\n\u003cli data-start=\"3764\" data-end=\"3798\"\u003e\n\u003cstrong data-start=\"3764\" data-end=\"3778\"\u003eComponent:\u003c\/strong\u003e High-Limit Switch\u003c\/li\u003e\n\u003cli data-start=\"3801\" data-end=\"3836\"\u003e\n\u003cstrong data-start=\"3801\" data-end=\"3814\"\u003eFunction:\u003c\/strong\u003e Overheat protection\u003c\/li\u003e\n\u003cli data-start=\"3839\" data-end=\"3913\"\u003e\n\u003cstrong data-start=\"3839\" data-end=\"3855\"\u003eApplication:\u003c\/strong\u003e Compatible Atwood \u0026amp; Dometic furnace models listed above\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3915\" data-end=\"3918\"\u003e\n\u003ch2 data-start=\"3920\" data-end=\"3955\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003ch3 data-start=\"3957\" data-end=\"4002\"\u003eQ: What does a furnace limit switch do?\u003c\/h3\u003e\n\u003cp data-start=\"4003\" data-end=\"4118\"\u003eA: It protects the furnace from overheating by shutting off the burner if internal temperatures exceed safe limits.\u003c\/p\u003e\n\u003chr data-start=\"4120\" data-end=\"4123\"\u003e\n\u003ch3 data-start=\"4125\" data-end=\"4191\"\u003eQ: Will a bad limit switch cause the furnace to short cycle?\u003c\/h3\u003e\n\u003cp data-start=\"4192\" data-end=\"4293\"\u003eA: Yes. A faulty or weak limit switch can cause repeated cycling or shutdowns shortly after ignition.\u003c\/p\u003e\n\u003chr data-start=\"4295\" data-end=\"4298\"\u003e\n\u003ch3 data-start=\"4300\" data-end=\"4346\"\u003eQ: Is this an OEM Dometic \/ Atwood part?\u003c\/h3\u003e\n\u003cp data-start=\"4347\" data-end=\"4405\"\u003eA: Yes. Part 31091 is a genuine OEM replacement component.\u003c\/p\u003e\n\u003chr data-start=\"4407\" data-end=\"4410\"\u003e\n\u003ch3 data-start=\"4412\" data-end=\"4466\"\u003eQ: Does this fit both AF and DF series furnaces?\u003c\/h3\u003e\n\u003cp data-start=\"4467\" data-end=\"4567\"\u003eA: Yes. It fits compatible AFLA, AFMD, AFSD, DFMD, DFSD, DFLA, DFLD and related series listed above.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47854744338673,"sku":null,"price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/31091.png?v=1772312346"},{"product_id":"dometic-atwood-37021-furnace-limit-switch-8900-ii-8900-iii-series","title":"Dometic \/ Atwood 37021 Furnace Limit Switch – 8900-II \/ 8900-III Series","description":"\u003ch2 data-start=\"139\" data-end=\"215\"\u003eDometic \/ Atwood 37021 Furnace Limit Switch – 8900-II \/ 8900-III Series\u003c\/h2\u003e\n\u003cp data-start=\"216\" data-end=\"243\"\u003e\u003cstrong data-start=\"216\" data-end=\"243\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"245\" data-end=\"416\"\u003e\u003cstrong data-start=\"245\" data-end=\"261\"\u003ePart Number:\u003c\/strong\u003e 37021\u003cbr data-start=\"267\" data-end=\"270\"\u003e\u003cstrong data-start=\"270\" data-end=\"287\"\u003eProduct Type:\u003c\/strong\u003e Furnace Limit Switch (High Temperature Safety Switch)\u003cbr data-start=\"341\" data-end=\"344\"\u003e\u003cstrong data-start=\"344\" data-end=\"360\"\u003eApplication:\u003c\/strong\u003e Atwood HydroFlame® 8900-II \u0026amp; 8900-III Series Furnaces\u003c\/p\u003e\n\u003chr data-start=\"418\" data-end=\"421\"\u003e\n\u003ch3 data-start=\"423\" data-end=\"445\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp data-start=\"447\" data-end=\"627\"\u003eThe \u003cstrong data-start=\"451\" data-end=\"498\"\u003eDometic \/ Atwood 37021 Furnace Limit Switch\u003c\/strong\u003e is a genuine OEM high-temperature safety switch designed for select \u003cstrong data-start=\"567\" data-end=\"626\"\u003eAtwood HydroFlame® 8900-II and 8900-III series furnaces\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"629\" data-end=\"900\"\u003eThis limit switch monitors the internal temperature of the furnace and automatically interrupts burner operation if temperatures exceed safe operating limits. It plays a critical role in preventing overheating and protecting the heat exchanger and surrounding components.\u003c\/p\u003e\n\u003cp data-start=\"902\" data-end=\"1147\"\u003eIf your furnace is shutting down after ignition, short-cycling once warmed up, or failing to maintain burner operation, a weak or failed limit switch may be the cause. Replacing it with OEM Part 37021 restores safe, reliable heating performance.\u003c\/p\u003e\n\u003cp data-start=\"1149\" data-end=\"1263\"\u003eManufactured to original equipment specifications, this component ensures proper fitment and dependable operation.\u003c\/p\u003e\n\u003chr data-start=\"1265\" data-end=\"1268\"\u003e\n\u003ch3 data-start=\"1270\" data-end=\"1288\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1292\" data-end=\"1339\"\u003eGenuine OEM Dometic \/ Atwood replacement part\u003c\/li\u003e\n\u003cli data-start=\"1342\" data-end=\"1380\"\u003eHigh-temperature overheat protection\u003c\/li\u003e\n\u003cli data-start=\"1383\" data-end=\"1427\"\u003eDesigned for 8900-II and 8900-III furnaces\u003c\/li\u003e\n\u003cli data-start=\"1430\" data-end=\"1463\"\u003eRestores safe furnace operation\u003c\/li\u003e\n\u003cli data-start=\"1466\" data-end=\"1524\"\u003eDirect replacement for original factory-installed switch\u003c\/li\u003e\n\u003cli data-start=\"1527\" data-end=\"1573\"\u003eManufactured to original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1575\" data-end=\"1578\"\u003e\n\u003ch3 data-start=\"1580\" data-end=\"1611\"\u003eCompatible Furnace Models\u003c\/h3\u003e\n\u003cp data-start=\"1613\" data-end=\"1650\"\u003e\u003cstrong data-start=\"1613\" data-end=\"1650\"\u003eAtwood HydroFlame® 8900-II Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1653\" data-end=\"1665\"\u003e8935-AC-II\u003c\/li\u003e\n\u003cli data-start=\"1668\" data-end=\"1680\"\u003e8935-DC-II\u003c\/li\u003e\n\u003cli data-start=\"1683\" data-end=\"1695\"\u003e8940-AC-II\u003c\/li\u003e\n\u003cli data-start=\"1698\" data-end=\"1710\"\u003e8940-DC-II\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1712\" data-end=\"1750\"\u003e\u003cstrong data-start=\"1712\" data-end=\"1750\"\u003eAtwood HydroFlame® 8900-III Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1753\" data-end=\"1766\"\u003e8935-AC-III\u003c\/li\u003e\n\u003cli data-start=\"1769\" data-end=\"1782\"\u003e8935-DC-III\u003c\/li\u003e\n\u003cli data-start=\"1785\" data-end=\"1798\"\u003e8940-AC-III\u003c\/li\u003e\n\u003cli data-start=\"1801\" data-end=\"1814\"\u003e8940-DC-III\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote data-start=\"1816\" data-end=\"1896\"\u003e\n\u003cp data-start=\"1818\" data-end=\"1896\"\u003eAlways verify your exact furnace model on the unit data plate before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1898\" data-end=\"1901\"\u003e\n\u003ch3 data-start=\"1903\" data-end=\"1948\"\u003eWhen Should You Replace the Limit Switch?\u003c\/h3\u003e\n\u003cp data-start=\"1950\" data-end=\"2005\"\u003eYou may need to replace the limit switch if you notice:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2009\" data-end=\"2048\"\u003eFurnace ignites but shuts off quickly\u003c\/li\u003e\n\u003cli data-start=\"2051\" data-end=\"2075\"\u003eRepeated short cycling\u003c\/li\u003e\n\u003cli data-start=\"2078\" data-end=\"2124\"\u003eBurner operation stops once furnace heats up\u003c\/li\u003e\n\u003cli data-start=\"2127\" data-end=\"2177\"\u003eDiagnostic testing confirms limit switch failure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2179\" data-end=\"2280\"\u003eThe limit switch is a critical safety device and should always be replaced with the correct OEM part.\u003c\/p\u003e\n\u003chr data-start=\"2282\" data-end=\"2285\"\u003e\n\u003ch3 data-start=\"2287\" data-end=\"2315\"\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2319\" data-end=\"2355\"\u003e\n\u003cstrong data-start=\"2319\" data-end=\"2336\"\u003eManufacturer:\u003c\/strong\u003e Dometic \/ Atwood\u003c\/li\u003e\n\u003cli data-start=\"2358\" data-end=\"2382\"\u003e\n\u003cstrong data-start=\"2358\" data-end=\"2374\"\u003ePart Number:\u003c\/strong\u003e 37021\u003c\/li\u003e\n\u003cli data-start=\"2385\" data-end=\"2426\"\u003e\n\u003cstrong data-start=\"2385\" data-end=\"2399\"\u003eComponent:\u003c\/strong\u003e High Limit Safety Switch\u003c\/li\u003e\n\u003cli data-start=\"2429\" data-end=\"2473\"\u003e\n\u003cstrong data-start=\"2429\" data-end=\"2445\"\u003eApplication:\u003c\/strong\u003e 8900-II \u0026amp; 8900-III Series\u003c\/li\u003e\n\u003cli data-start=\"2476\" data-end=\"2509\"\u003e\n\u003cstrong data-start=\"2476\" data-end=\"2489\"\u003eIncludes:\u003c\/strong\u003e Limit switch only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2511\" data-end=\"2514\"\u003e\n\u003ch2 data-start=\"2516\" data-end=\"2551\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003ch3 data-start=\"2553\" data-end=\"2598\"\u003eQ: What does a furnace limit switch do?\u003c\/h3\u003e\n\u003cp data-start=\"2599\" data-end=\"2707\"\u003eA: It prevents overheating by shutting off the burner circuit when internal temperatures exceed safe limits.\u003c\/p\u003e\n\u003chr data-start=\"2709\" data-end=\"2712\"\u003e\n\u003ch3 data-start=\"2714\" data-end=\"2753\"\u003eQ: Will this fit 8900-I furnaces?\u003c\/h3\u003e\n\u003cp data-start=\"2754\" data-end=\"2877\"\u003eA: This listing is specifically for 8900-II and 8900-III series models. Always confirm your furnace series before ordering.\u003c\/p\u003e\n\u003chr data-start=\"2879\" data-end=\"2882\"\u003e\n\u003ch3 data-start=\"2884\" data-end=\"2930\"\u003eQ: Is this an OEM Dometic \/ Atwood part?\u003c\/h3\u003e\n\u003cp data-start=\"2931\" data-end=\"2989\"\u003eA: Yes. Part 37021 is a genuine OEM replacement component.\u003c\/p\u003e\n\u003chr data-start=\"2991\" data-end=\"2994\"\u003e\n\u003ch3 data-start=\"2996\" data-end=\"3048\"\u003eQ: Can a bad limit switch cause short cycling?\u003c\/h3\u003e\n\u003cp data-start=\"3049\" data-end=\"3150\"\u003eA: Yes. A weak or failing limit switch can cause the furnace to shut down prematurely after ignition.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47854803550449,"sku":null,"price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/37021.png?v=1772314431"},{"product_id":"dometic-atwood-37022-furnace-limit-switch-8500-iii-8500-iv-8500-ld","title":"Dometic \/ Atwood 37022 Furnace Limit Switch – 8500-III \/ 8500-IV \/ 8500 LD","description":"\u003ch2 data-start=\"167\" data-end=\"246\"\u003eDometic \/ Atwood 37022 Furnace Limit Switch – 8500-III \/ 8500-IV \/ 8500 LD\u003c\/h2\u003e\n\u003cp data-start=\"247\" data-end=\"274\"\u003e\u003cstrong data-start=\"247\" data-end=\"274\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"276\" data-end=\"444\"\u003e\u003cstrong data-start=\"276\" data-end=\"292\"\u003ePart Number:\u003c\/strong\u003e 37022\u003cbr data-start=\"298\" data-end=\"301\"\u003e\u003cstrong data-start=\"301\" data-end=\"318\"\u003eProduct Type:\u003c\/strong\u003e Furnace Limit Switch (High Temperature Safety Switch)\u003cbr data-start=\"372\" data-end=\"375\"\u003e\u003cstrong data-start=\"375\" data-end=\"391\"\u003eApplication:\u003c\/strong\u003e Atwood 8500-III, 8500-IV \u0026amp; 8500 LD Series Furnaces\u003c\/p\u003e\n\u003chr data-start=\"446\" data-end=\"449\"\u003e\n\u003ch3 data-start=\"451\" data-end=\"473\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp data-start=\"475\" data-end=\"653\"\u003eThe \u003cstrong data-start=\"479\" data-end=\"526\"\u003eDometic \/ Atwood 37022 Furnace Limit Switch\u003c\/strong\u003e is a genuine OEM high-temperature safety switch designed for select \u003cstrong data-start=\"595\" data-end=\"652\"\u003eAtwood 8500-III, 8500-IV, and 8500 LD series furnaces\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"655\" data-end=\"896\"\u003eThis limit switch monitors internal furnace temperature and automatically interrupts burner operation if temperatures exceed safe operating levels. It plays a critical role in protecting the heat exchanger and preventing furnace overheating.\u003c\/p\u003e\n\u003cp data-start=\"898\" data-end=\"1151\"\u003eIf your furnace ignites but shuts down quickly, short-cycles once heated, or fails to maintain burner operation, a faulty limit switch may be the cause. Replacing it with OEM Part 37022 restores proper safety protection and reliable heating performance.\u003c\/p\u003e\n\u003cp data-start=\"1153\" data-end=\"1282\"\u003eManufactured to original equipment specifications, this component ensures correct temperature calibration and dependable fitment.\u003c\/p\u003e\n\u003chr data-start=\"1284\" data-end=\"1287\"\u003e\n\u003ch3 data-start=\"1289\" data-end=\"1307\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1311\" data-end=\"1358\"\u003eGenuine OEM Dometic \/ Atwood replacement part\u003c\/li\u003e\n\u003cli data-start=\"1361\" data-end=\"1396\"\u003eHigh-limit overheat safety switch\u003c\/li\u003e\n\u003cli data-start=\"1399\" data-end=\"1450\"\u003eDesigned for 8500-III, 8500-IV and 8500 LD series\u003c\/li\u003e\n\u003cli data-start=\"1453\" data-end=\"1508\"\u003eProtects furnace from excessive internal temperatures\u003c\/li\u003e\n\u003cli data-start=\"1511\" data-end=\"1557\"\u003eRestores safe and reliable heating operation\u003c\/li\u003e\n\u003cli data-start=\"1560\" data-end=\"1606\"\u003eManufactured to original equipment standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1608\" data-end=\"1611\"\u003e\n\u003ch3 data-start=\"1613\" data-end=\"1644\"\u003eCompatible Furnace Models\u003c\/h3\u003e\n\u003cp data-start=\"1646\" data-end=\"1680\"\u003ePart \u003cstrong data-start=\"1651\" data-end=\"1660\"\u003e37022\u003c\/strong\u003e is compatible with:\u003c\/p\u003e\n\u003cp data-start=\"1682\" data-end=\"1703\"\u003e\u003cstrong data-start=\"1682\" data-end=\"1701\"\u003e8500-III Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1706\" data-end=\"1716\"\u003e8516-III\u003c\/li\u003e\n\u003cli data-start=\"1719\" data-end=\"1729\"\u003e8520-III\u003c\/li\u003e\n\u003cli data-start=\"1732\" data-end=\"1742\"\u003e8525-III\u003c\/li\u003e\n\u003cli data-start=\"1745\" data-end=\"1755\"\u003e8531-III\u003c\/li\u003e\n\u003cli data-start=\"1758\" data-end=\"1768\"\u003e8535-III\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1770\" data-end=\"1790\"\u003e\u003cstrong data-start=\"1770\" data-end=\"1788\"\u003e8500-IV Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1793\" data-end=\"1802\"\u003e8516-IV\u003c\/li\u003e\n\u003cli data-start=\"1805\" data-end=\"1814\"\u003e8520-IV\u003c\/li\u003e\n\u003cli data-start=\"1817\" data-end=\"1826\"\u003e8525-IV\u003c\/li\u003e\n\u003cli data-start=\"1829\" data-end=\"1838\"\u003e8531-IV\u003c\/li\u003e\n\u003cli data-start=\"1841\" data-end=\"1850\"\u003e8535-IV\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1852\" data-end=\"1872\"\u003e\u003cstrong data-start=\"1852\" data-end=\"1870\"\u003e8500 LD Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1875\" data-end=\"1884\"\u003e8516-LD\u003c\/li\u003e\n\u003cli data-start=\"1887\" data-end=\"1896\"\u003e8520-LD\u003c\/li\u003e\n\u003cli data-start=\"1899\" data-end=\"1908\"\u003e8525-LD\u003c\/li\u003e\n\u003cli data-start=\"1911\" data-end=\"1920\"\u003e8531-LD\u003c\/li\u003e\n\u003cli data-start=\"1923\" data-end=\"1932\"\u003e8535-LD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote data-start=\"1934\" data-end=\"2032\"\u003e\n\u003cp data-start=\"1936\" data-end=\"2032\"\u003eAlways verify your furnace model on the unit data plate before ordering to ensure compatibility.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"2034\" data-end=\"2037\"\u003e\n\u003ch3 data-start=\"2039\" data-end=\"2084\"\u003eWhen Should You Replace the Limit Switch?\u003c\/h3\u003e\n\u003cp data-start=\"2086\" data-end=\"2145\"\u003eYou may need to replace the limit switch if you experience:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2149\" data-end=\"2194\"\u003eFurnace shutting off shortly after ignition\u003c\/li\u003e\n\u003cli data-start=\"2197\" data-end=\"2221\"\u003eRepeated short cycling\u003c\/li\u003e\n\u003cli data-start=\"2224\" data-end=\"2267\"\u003eBlower running but burner not staying lit\u003c\/li\u003e\n\u003cli data-start=\"2270\" data-end=\"2301\"\u003eOverheat diagnostic condition\u003c\/li\u003e\n\u003cli data-start=\"2304\" data-end=\"2355\"\u003eConfirmed failed switch during electrical testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2357\" data-end=\"2452\"\u003eThe limit switch is a critical safety device and must match your furnace model and calibration.\u003c\/p\u003e\n\u003chr data-start=\"2454\" data-end=\"2457\"\u003e\n\u003ch3 data-start=\"2459\" data-end=\"2487\"\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2491\" data-end=\"2527\"\u003e\n\u003cstrong data-start=\"2491\" data-end=\"2508\"\u003eManufacturer:\u003c\/strong\u003e Dometic \/ Atwood\u003c\/li\u003e\n\u003cli data-start=\"2530\" data-end=\"2554\"\u003e\n\u003cstrong data-start=\"2530\" data-end=\"2546\"\u003ePart Number:\u003c\/strong\u003e 37022\u003c\/li\u003e\n\u003cli data-start=\"2557\" data-end=\"2598\"\u003e\n\u003cstrong data-start=\"2557\" data-end=\"2571\"\u003eComponent:\u003c\/strong\u003e High Limit Safety Switch\u003c\/li\u003e\n\u003cli data-start=\"2601\" data-end=\"2654\"\u003e\n\u003cstrong data-start=\"2601\" data-end=\"2617\"\u003eApplication:\u003c\/strong\u003e 8500-III, 8500-IV \u0026amp; 8500 LD Series\u003c\/li\u003e\n\u003cli data-start=\"2657\" data-end=\"2690\"\u003e\n\u003cstrong data-start=\"2657\" data-end=\"2670\"\u003eIncludes:\u003c\/strong\u003e Limit switch only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2692\" data-end=\"2695\"\u003e\n\u003ch2 data-start=\"2697\" data-end=\"2732\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003ch3 data-start=\"2734\" data-end=\"2779\"\u003eQ: What does a furnace limit switch do?\u003c\/h3\u003e\n\u003cp data-start=\"2780\" data-end=\"2902\"\u003eA: It protects the furnace from overheating by shutting off burner operation if temperatures exceed safe operating limits.\u003c\/p\u003e\n\u003chr data-start=\"2904\" data-end=\"2907\"\u003e\n\u003ch3 data-start=\"2909\" data-end=\"2949\"\u003eQ: Will this fit 8500-II furnaces?\u003c\/h3\u003e\n\u003cp data-start=\"2950\" data-end=\"3072\"\u003eA: This listing is specifically for 8500-III, 8500-IV, and 8500 LD series models. Always confirm your exact furnace model.\u003c\/p\u003e\n\u003chr data-start=\"3074\" data-end=\"3077\"\u003e\n\u003ch3 data-start=\"3079\" data-end=\"3132\"\u003eQ: Can a bad limit switch cause cycling issues?\u003c\/h3\u003e\n\u003cp data-start=\"3133\" data-end=\"3234\"\u003eA: Yes. A weak or faulty limit switch can cause the furnace to ignite and then shut down prematurely.\u003c\/p\u003e\n\u003chr data-start=\"3236\" data-end=\"3239\"\u003e\n\u003ch3 data-start=\"3241\" data-end=\"3287\"\u003eQ: Is this an OEM Dometic \/ Atwood part?\u003c\/h3\u003e\n\u003cp data-start=\"3288\" data-end=\"3341\"\u003eA: Yes. 37022 is a genuine OEM replacement component.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47854805844209,"sku":null,"price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/37022.png?v=1772314801"},{"product_id":"dometic-atwood-36160-furnace-low-air-flow-switch-sail-switch","title":"Dometic \/ Atwood 36160 Furnace Low Air Flow Switch (Sail Switch)","description":"\u003ch2 data-start=\"149\" data-end=\"218\"\u003eDometic \/ Atwood 36160 Furnace Low Air Flow Switch (Sail Switch)\u003c\/h2\u003e\n\u003cp data-start=\"219\" data-end=\"246\"\u003e\u003cstrong data-start=\"219\" data-end=\"246\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"248\" data-end=\"326\"\u003e\u003cstrong data-start=\"248\" data-end=\"264\"\u003ePart Number:\u003c\/strong\u003e 36160\u003cbr data-start=\"270\" data-end=\"273\"\u003e\u003cstrong data-start=\"273\" data-end=\"290\"\u003eProduct Type:\u003c\/strong\u003e Low Air Flow Switch \/ Sail Switch\u003c\/p\u003e\n\u003chr data-start=\"328\" data-end=\"331\"\u003e\n\u003ch3 data-start=\"333\" data-end=\"362\"\u003eSerial Number Requirement\u003c\/h3\u003e\n\u003cp data-start=\"364\" data-end=\"451\"\u003eThis part is compatible \u003cstrong data-start=\"388\" data-end=\"450\"\u003eonly with furnaces that have Serial Numbers AFTER 72498929\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"453\" data-end=\"510\"\u003eAlways verify your furnace serial number before ordering.\u003c\/p\u003e\n\u003chr data-start=\"512\" data-end=\"515\"\u003e\n\u003ch2 data-start=\"517\" data-end=\"536\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"538\" data-end=\"695\"\u003eThe \u003cstrong data-start=\"542\" data-end=\"602\"\u003eDometic \/ Atwood 36160 Sail Switch (Low Air Flow Switch)\u003c\/strong\u003e is a genuine OEM airflow safety device designed for select Atwood AF and DF series furnaces.\u003c\/p\u003e\n\u003cp data-start=\"697\" data-end=\"969\"\u003eThe sail switch verifies adequate blower airflow before allowing the burner to ignite. If airflow is insufficient due to blocked ducting, debris, weak blower motor, or restricted vents, the switch prevents ignition to protect the furnace from unsafe combustion conditions.\u003c\/p\u003e\n\u003cp data-start=\"971\" data-end=\"1211\"\u003eIf your furnace blower runs but the burner does not ignite, or ignition is intermittent, a faulty sail switch is one of the most common causes. Replacing it with OEM Part 36160 restores proper ignition sequencing and safe furnace operation.\u003c\/p\u003e\n\u003cp data-start=\"1213\" data-end=\"1327\"\u003eManufactured to original equipment specifications, this switch ensures correct calibration and dependable fitment.\u003c\/p\u003e\n\u003chr data-start=\"1329\" data-end=\"1332\"\u003e\n\u003ch2 data-start=\"1334\" data-end=\"1364\"\u003eCompatible Furnace Models\u003c\/h2\u003e\n\u003ch3 data-start=\"1366\" data-end=\"1396\"\u003eDometic Atwood AF Series\u003c\/h3\u003e\n\u003cp data-start=\"1397\" data-end=\"1428\"\u003e(Serial Numbers AFTER 72498929)\u003c\/p\u003e\n\u003cp data-start=\"1430\" data-end=\"1481\"\u003eAFSAD12111\u003cbr data-start=\"1440\" data-end=\"1443\"\u003eAFSAD12121\u003cbr data-start=\"1453\" data-end=\"1456\"\u003eAFSAD12131\u003cbr data-start=\"1466\" data-end=\"1469\"\u003eAFSAD12141\u003c\/p\u003e\n\u003cp data-start=\"1483\" data-end=\"1530\"\u003eAFSD12111\u003cbr data-start=\"1492\" data-end=\"1495\"\u003eAFSD12121\u003cbr data-start=\"1504\" data-end=\"1507\"\u003eAFSD12131\u003cbr data-start=\"1516\" data-end=\"1519\"\u003eAFSD12141\u003c\/p\u003e\n\u003cp data-start=\"1532\" data-end=\"1579\"\u003eAFSD16111\u003cbr data-start=\"1541\" data-end=\"1544\"\u003eAFSD16121\u003cbr data-start=\"1553\" data-end=\"1556\"\u003eAFSD16131\u003cbr data-start=\"1565\" data-end=\"1568\"\u003eAFSD16141\u003c\/p\u003e\n\u003cp data-start=\"1581\" data-end=\"1628\"\u003eAFSD20111\u003cbr data-start=\"1590\" data-end=\"1593\"\u003eAFSD20121\u003cbr data-start=\"1602\" data-end=\"1605\"\u003eAFSD20131\u003cbr data-start=\"1614\" data-end=\"1617\"\u003eAFSD20141\u003c\/p\u003e\n\u003cp data-start=\"1630\" data-end=\"1642\"\u003eAFSDA12121\u003c\/p\u003e\n\u003cp data-start=\"1644\" data-end=\"1703\"\u003eAFMD16111\u003cbr data-start=\"1653\" data-end=\"1656\"\u003eAFMD16121\u003cbr data-start=\"1665\" data-end=\"1668\"\u003eAFMD16131\u003cbr data-start=\"1677\" data-end=\"1680\"\u003eAFMD16141\u003cbr data-start=\"1689\" data-end=\"1692\"\u003eAFMD16151\u003c\/p\u003e\n\u003cp data-start=\"1705\" data-end=\"1764\"\u003eAFMD20111\u003cbr data-start=\"1714\" data-end=\"1717\"\u003eAFMD20121\u003cbr data-start=\"1726\" data-end=\"1729\"\u003eAFMD20131\u003cbr data-start=\"1738\" data-end=\"1741\"\u003eAFMD20141\u003cbr data-start=\"1750\" data-end=\"1753\"\u003eAFMD20151\u003c\/p\u003e\n\u003chr data-start=\"1766\" data-end=\"1769\"\u003e\n\u003ch3 data-start=\"1771\" data-end=\"1811\"\u003eDometic Atwood DFSD \u0026amp; DFSAD Series\u003c\/h3\u003e\n\u003cp data-start=\"1812\" data-end=\"1843\"\u003e(Serial Numbers AFTER 72498929)\u003c\/p\u003e\n\u003cp data-start=\"1845\" data-end=\"1896\"\u003eDFSAD12111\u003cbr data-start=\"1855\" data-end=\"1858\"\u003eDFSAD12121\u003cbr data-start=\"1868\" data-end=\"1871\"\u003eDFSAD12131\u003cbr data-start=\"1881\" data-end=\"1884\"\u003eDFSAD12141\u003c\/p\u003e\n\u003cp data-start=\"1898\" data-end=\"1957\"\u003eDFSD12111\u003cbr data-start=\"1907\" data-end=\"1910\"\u003eDFSD12121\u003cbr data-start=\"1919\" data-end=\"1922\"\u003eDFSD12131\u003cbr data-start=\"1931\" data-end=\"1934\"\u003eDFSD12141\u003cbr data-start=\"1943\" data-end=\"1946\"\u003eDFSD12151\u003c\/p\u003e\n\u003cp data-start=\"1959\" data-end=\"2018\"\u003eDFSD16111\u003cbr data-start=\"1968\" data-end=\"1971\"\u003eDFSD16121\u003cbr data-start=\"1980\" data-end=\"1983\"\u003eDFSD16131\u003cbr data-start=\"1992\" data-end=\"1995\"\u003eDFSD16141\u003cbr data-start=\"2004\" data-end=\"2007\"\u003eDFSD16151\u003c\/p\u003e\n\u003cp data-start=\"2020\" data-end=\"2079\"\u003eDFSD20111\u003cbr data-start=\"2029\" data-end=\"2032\"\u003eDFSD20121\u003cbr data-start=\"2041\" data-end=\"2044\"\u003eDFSD20131\u003cbr data-start=\"2053\" data-end=\"2056\"\u003eDFSD20141\u003cbr data-start=\"2065\" data-end=\"2068\"\u003eDFSD20151\u003c\/p\u003e\n\u003chr data-start=\"2081\" data-end=\"2084\"\u003e\n\u003cp data-start=\"2086\" data-end=\"2223\"\u003eImportant: Furnaces manufactured before Serial Number 72498929 use a different sail switch design and are not compatible with Part 36160.\u003c\/p\u003e\n\u003chr data-start=\"2225\" data-end=\"2228\"\u003e\n\u003ch2 data-start=\"2230\" data-end=\"2273\"\u003eWhen Should You Replace the Sail Switch?\u003c\/h2\u003e\n\u003cp data-start=\"2275\" data-end=\"2318\"\u003eYou may need to replace the sail switch if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2322\" data-end=\"2370\"\u003eThe blower runs but the burner will not ignite\u003c\/li\u003e\n\u003cli data-start=\"2373\" data-end=\"2415\"\u003eFurnace attempts ignition but shuts down\u003c\/li\u003e\n\u003cli data-start=\"2418\" data-end=\"2443\"\u003eHeating is intermittent\u003c\/li\u003e\n\u003cli data-start=\"2446\" data-end=\"2484\"\u003eAirflow fault condition is indicated\u003c\/li\u003e\n\u003cli data-start=\"2487\" data-end=\"2538\"\u003eThe switch paddle is stuck, bent, or contaminated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2540\" data-end=\"2623\"\u003eSail switches are one of the most common failure points in Dometic\/Atwood furnaces.\u003c\/p\u003e\n\u003chr data-start=\"2625\" data-end=\"2628\"\u003e\n\u003ch2 data-start=\"2630\" data-end=\"2655\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2657\" data-end=\"2873\"\u003eManufacturer: Dometic \/ Atwood\u003cbr data-start=\"2687\" data-end=\"2690\"\u003ePart Number: 36160\u003cbr data-start=\"2708\" data-end=\"2711\"\u003eComponent: Sail Switch (Low Air Flow Switch)\u003cbr data-start=\"2755\" data-end=\"2758\"\u003eApplication: Select AF, DFSD \u0026amp; DFSAD Series\u003cbr data-start=\"2801\" data-end=\"2804\"\u003eSerial Requirement: After 72498929\u003cbr data-start=\"2838\" data-end=\"2841\"\u003eIncludes: Sail switch assembly\u003c\/p\u003e\n\u003chr data-start=\"2875\" data-end=\"2878\"\u003e\n\u003ch2 data-start=\"2880\" data-end=\"2915\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"2917\" data-end=\"3037\"\u003eQ: What does a sail switch do?\u003cbr data-start=\"2947\" data-end=\"2950\"\u003eA: It confirms sufficient airflow from the blower before allowing the burner to ignite.\u003c\/p\u003e\n\u003cp data-start=\"3039\" data-end=\"3190\"\u003eQ: Why does my furnace blower run but not ignite?\u003cbr data-start=\"3088\" data-end=\"3091\"\u003eA: A failed sail switch is a very common cause of ignition failure when blower operation is normal.\u003c\/p\u003e\n\u003cp data-start=\"3192\" data-end=\"3343\"\u003eQ: Why does the serial number matter?\u003cbr data-start=\"3229\" data-end=\"3232\"\u003eA: Units built before Serial Number 72498929 use a different switch design and require a different part number.\u003c\/p\u003e\n\u003cp data-start=\"3345\" data-end=\"3437\"\u003eQ: Is this an OEM part?\u003cbr data-start=\"3368\" data-end=\"3371\"\u003eA: Yes. 36160 is a genuine Dometic \/ Atwood replacement component.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47854818853105,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/36160.jpg?v=1772315879"},{"product_id":"dometic-atwood-36165-furnace-low-air-flow-switch-sail-switch-afmd-afla-afld-dfmd-dfla-dfld","title":"Dometic \/ Atwood 36165 Furnace Low Air Flow Switch (Sail Switch) - AFMD, AFLA, AFLD, DFMD, DFLA, DFLD","description":"\u003ch2 data-start=\"192\" data-end=\"261\"\u003eDometic \/ Atwood 36165 Furnace Low Air Flow Switch (Sail Switch)\u003c\/h2\u003e\n\u003cp data-start=\"262\" data-end=\"289\"\u003e\u003cstrong data-start=\"262\" data-end=\"289\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"291\" data-end=\"459\"\u003e\u003cstrong data-start=\"291\" data-end=\"307\"\u003ePart Number:\u003c\/strong\u003e 36165\u003cbr data-start=\"313\" data-end=\"316\"\u003e\u003cstrong data-start=\"316\" data-end=\"333\"\u003eProduct Type:\u003c\/strong\u003e Furnace Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"375\" data-end=\"378\"\u003e\u003cstrong data-start=\"378\" data-end=\"394\"\u003eApplication:\u003c\/strong\u003e Atwood HydroFlame AF Medium \u0026amp; Dometic DF Medium Model Furnaces\u003c\/p\u003e\n\u003chr data-start=\"461\" data-end=\"464\"\u003e\n\u003ch2 data-start=\"466\" data-end=\"485\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"487\" data-end=\"665\"\u003eThe \u003cstrong data-start=\"491\" data-end=\"551\"\u003eDometic \/ Atwood 36165 Sail Switch (Low Air Flow Switch)\u003c\/strong\u003e is a genuine OEM airflow verification switch designed for select \u003cstrong data-start=\"617\" data-end=\"630\"\u003eAF Medium\u003c\/strong\u003e and \u003cstrong data-start=\"635\" data-end=\"648\"\u003eDF Medium\u003c\/strong\u003e series furnaces.\u003c\/p\u003e\n\u003cp data-start=\"667\" data-end=\"945\"\u003eThe sail switch confirms adequate blower airflow before allowing ignition. If airflow is restricted due to debris, weak blower output, blocked ducts, or dirty return air passages, the switch prevents the burner from igniting to protect against unsafe combustion and overheating.\u003c\/p\u003e\n\u003cp data-start=\"947\" data-end=\"1082\"\u003eIf your blower motor runs but the burner will not light, or ignition is intermittent, the sail switch is one of the most common causes.\u003c\/p\u003e\n\u003cp data-start=\"1084\" data-end=\"1164\"\u003eOEM Part 36165 restores proper ignition sequencing and safe furnace performance.\u003c\/p\u003e\n\u003chr data-start=\"1166\" data-end=\"1169\"\u003e\n\u003ch2 data-start=\"1171\" data-end=\"1186\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1188\" data-end=\"1475\"\u003e\n\u003cli data-start=\"1188\" data-end=\"1237\"\u003e\n\u003cp data-start=\"1190\" data-end=\"1237\"\u003eGenuine OEM Dometic \/ Atwood replacement part\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1238\" data-end=\"1293\"\u003e\n\u003cp data-start=\"1240\" data-end=\"1293\"\u003eDesigned for AF Medium and DF Medium model furnaces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1294\" data-end=\"1337\"\u003e\n\u003cp data-start=\"1296\" data-end=\"1337\"\u003eVerifies blower airflow before ignition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1338\" data-end=\"1374\"\u003e\n\u003cp data-start=\"1340\" data-end=\"1374\"\u003ePrevents unsafe burner operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1375\" data-end=\"1426\"\u003e\n\u003cp data-start=\"1377\" data-end=\"1426\"\u003eDirect replacement for listed compatible models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1427\" data-end=\"1475\"\u003e\n\u003cp data-start=\"1429\" data-end=\"1475\"\u003eManufactured to original equipment standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1477\" data-end=\"1480\"\u003e\n\u003ch1 data-start=\"1482\" data-end=\"1509\"\u003eCompatible Furnace Models\u003c\/h1\u003e\n\u003chr data-start=\"1511\" data-end=\"1514\"\u003e\n\u003cp data-start=\"1516\" data-end=\"1532\"\u003e\u003cspan\u003ePlease be aware that there is no precise serial number distinction indicating the transition to the bent blade style in Atwood models, only that this part is suggested for these models with a Serial # above 724\u003c\/span\u003e\u003cstrong\u003eXXXXX\u003c\/strong\u003e\u003cspan\u003e. It is advised to compare your existing sail switch with the product image for verification. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"1516\" data-end=\"1532\"\u003eAFMD Series\u003c\/h2\u003e\n\u003cp data-start=\"1533\" data-end=\"1592\"\u003eAFMD16111\u003cbr data-start=\"1542\" data-end=\"1545\"\u003eAFMD16121\u003cbr data-start=\"1554\" data-end=\"1557\"\u003eAFMD16131\u003cbr data-start=\"1566\" data-end=\"1569\"\u003eAFMD16141\u003cbr data-start=\"1578\" data-end=\"1581\"\u003eAFMD16151\u003c\/p\u003e\n\u003cp data-start=\"1594\" data-end=\"1653\"\u003eAFMD20111\u003cbr data-start=\"1603\" data-end=\"1606\"\u003eAFMD20121\u003cbr data-start=\"1615\" data-end=\"1618\"\u003eAFMD20131\u003cbr data-start=\"1627\" data-end=\"1630\"\u003eAFMD20141\u003cbr data-start=\"1639\" data-end=\"1642\"\u003eAFMD20151\u003c\/p\u003e\n\u003cp data-start=\"1655\" data-end=\"1714\"\u003eAFMD25111\u003cbr data-start=\"1664\" data-end=\"1667\"\u003eAFMD25121\u003cbr data-start=\"1676\" data-end=\"1679\"\u003eAFMD25131\u003cbr data-start=\"1688\" data-end=\"1691\"\u003eAFMD25141\u003cbr data-start=\"1700\" data-end=\"1703\"\u003eAFMD25151\u003c\/p\u003e\n\u003cp data-start=\"1716\" data-end=\"1775\"\u003eAFMD30111\u003cbr data-start=\"1725\" data-end=\"1728\"\u003eAFMD30121\u003cbr data-start=\"1737\" data-end=\"1740\"\u003eAFMD30131\u003cbr data-start=\"1749\" data-end=\"1752\"\u003eAFMD30141\u003cbr data-start=\"1761\" data-end=\"1764\"\u003eAFMD30151\u003c\/p\u003e\n\u003cp data-start=\"1777\" data-end=\"1836\"\u003eAFMD35111\u003cbr data-start=\"1786\" data-end=\"1789\"\u003eAFMD35121\u003cbr data-start=\"1798\" data-end=\"1801\"\u003eAFMD35131\u003cbr data-start=\"1810\" data-end=\"1813\"\u003eAFMD35141\u003cbr data-start=\"1822\" data-end=\"1825\"\u003eAFMD35151\u003c\/p\u003e\n\u003chr data-start=\"1838\" data-end=\"1841\"\u003e\n\u003ch2 data-start=\"1843\" data-end=\"1859\"\u003eAFLA Series\u003c\/h2\u003e\n\u003cp data-start=\"1860\" data-end=\"1931\"\u003eAFLA35211\u003cbr data-start=\"1869\" data-end=\"1872\"\u003eAFLA35221\u003cbr data-start=\"1881\" data-end=\"1884\"\u003eAFLA35231\u003cbr data-start=\"1893\" data-end=\"1896\"\u003eAFLA40211\u003cbr data-start=\"1905\" data-end=\"1908\"\u003eAFLA40221\u003cbr data-start=\"1917\" data-end=\"1920\"\u003eAFLA40231\u003c\/p\u003e\n\u003chr data-start=\"1933\" data-end=\"1936\"\u003e\n\u003ch2 data-start=\"1938\" data-end=\"1954\"\u003eAFLD Series\u003c\/h2\u003e\n\u003cp data-start=\"1955\" data-end=\"2039\"\u003eAFLD35111\u003cbr data-start=\"1964\" data-end=\"1967\"\u003eAFLD35121\u003cbr data-start=\"1976\" data-end=\"1979\"\u003eAFLD35131\u003cbr data-start=\"1988\" data-end=\"1991\"\u003eAFLD40111\u003cbr data-start=\"2000\" data-end=\"2003\"\u003eAFLD40121\u003cbr data-start=\"2012\" data-end=\"2015\"\u003eAFLD40121W\u003cbr data-start=\"2025\" data-end=\"2028\"\u003eAFLD40131\u003c\/p\u003e\n\u003chr data-start=\"2041\" data-end=\"2044\"\u003e\n\u003ch2 data-start=\"2046\" data-end=\"2062\"\u003eDFMD Series\u003c\/h2\u003e\n\u003cp data-start=\"2063\" data-end=\"2097\"\u003e(Serial Number 72489157 and above)\u003c\/p\u003e\n\u003cp data-start=\"2099\" data-end=\"2158\"\u003eDFMD16111\u003cbr data-start=\"2108\" data-end=\"2111\"\u003eDFMD16121\u003cbr data-start=\"2120\" data-end=\"2123\"\u003eDFMD16131\u003cbr data-start=\"2132\" data-end=\"2135\"\u003eDFMD16141\u003cbr data-start=\"2144\" data-end=\"2147\"\u003eDFMD16151\u003c\/p\u003e\n\u003cp data-start=\"2160\" data-end=\"2219\"\u003eDFMD20111\u003cbr data-start=\"2169\" data-end=\"2172\"\u003eDFMD20121\u003cbr data-start=\"2181\" data-end=\"2184\"\u003eDFMD20131\u003cbr data-start=\"2193\" data-end=\"2196\"\u003eDFMD20141\u003cbr data-start=\"2205\" data-end=\"2208\"\u003eDFMD20151\u003c\/p\u003e\n\u003cp data-start=\"2221\" data-end=\"2280\"\u003eDFMD25111\u003cbr data-start=\"2230\" data-end=\"2233\"\u003eDFMD25121\u003cbr data-start=\"2242\" data-end=\"2245\"\u003eDFMD25131\u003cbr data-start=\"2254\" data-end=\"2257\"\u003eDFMD25141\u003cbr data-start=\"2266\" data-end=\"2269\"\u003eDFMD25151\u003c\/p\u003e\n\u003cp data-start=\"2282\" data-end=\"2341\"\u003eDFMD30111\u003cbr data-start=\"2291\" data-end=\"2294\"\u003eDFMD30121\u003cbr data-start=\"2303\" data-end=\"2306\"\u003eDFMD30131\u003cbr data-start=\"2315\" data-end=\"2318\"\u003eDFMD30141\u003cbr data-start=\"2327\" data-end=\"2330\"\u003eDFMD30151\u003c\/p\u003e\n\u003cp data-start=\"2343\" data-end=\"2415\"\u003eDFMD35111\u003cbr data-start=\"2352\" data-end=\"2355\"\u003eDFMD35121\u003cbr data-start=\"2364\" data-end=\"2367\"\u003eDFMD35121W\u003cbr data-start=\"2377\" data-end=\"2380\"\u003eDFMD35131\u003cbr data-start=\"2389\" data-end=\"2392\"\u003eDFMD35141\u003cbr data-start=\"2401\" data-end=\"2404\"\u003eDFMD35151\u003c\/p\u003e\n\u003chr data-start=\"2417\" data-end=\"2420\"\u003e\n\u003ch2 data-start=\"2422\" data-end=\"2438\"\u003eDFLD Series\u003c\/h2\u003e\n\u003cp data-start=\"2439\" data-end=\"2473\"\u003e(Serial Number 72991128 and above)\u003c\/p\u003e\n\u003cp data-start=\"2475\" data-end=\"2546\"\u003eDFLD35111\u003cbr data-start=\"2484\" data-end=\"2487\"\u003eDFLD35121\u003cbr data-start=\"2496\" data-end=\"2499\"\u003eDFLD35131\u003cbr data-start=\"2508\" data-end=\"2511\"\u003eDFLD40111\u003cbr data-start=\"2520\" data-end=\"2523\"\u003eDFLD40121\u003cbr data-start=\"2532\" data-end=\"2535\"\u003eDFLD40131\u003c\/p\u003e\n\u003chr data-start=\"2548\" data-end=\"2551\"\u003e\n\u003ch2 data-start=\"2553\" data-end=\"2569\"\u003eDFLA Series\u003c\/h2\u003e\n\u003cp data-start=\"2570\" data-end=\"2604\"\u003e(Serial Number 81689156 and above)\u003c\/p\u003e\n\u003cp data-start=\"2606\" data-end=\"2677\"\u003eDFLA35211\u003cbr data-start=\"2615\" data-end=\"2618\"\u003eDFLA35221\u003cbr data-start=\"2627\" data-end=\"2630\"\u003eDFLA35231\u003cbr data-start=\"2639\" data-end=\"2642\"\u003eDFLA40211\u003cbr data-start=\"2651\" data-end=\"2654\"\u003eDFLA40221\u003cbr data-start=\"2663\" data-end=\"2666\"\u003eDFLA40231\u003c\/p\u003e\n\u003chr data-start=\"2679\" data-end=\"2682\"\u003e\n\u003cblockquote data-start=\"2684\" data-end=\"2765\"\u003e\n\u003cp data-start=\"2686\" data-end=\"2765\"\u003eAlways verify both your furnace model number AND serial number before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"2767\" data-end=\"2770\"\u003e\n\u003ch2 data-start=\"2772\" data-end=\"2815\"\u003eWhen Should You Replace the Sail Switch?\u003c\/h2\u003e\n\u003cp data-start=\"2817\" data-end=\"2860\"\u003eYou may need to replace the sail switch if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2864\" data-end=\"2904\"\u003eBlower runs but burner does not ignite\u003c\/li\u003e\n\u003cli data-start=\"2907\" data-end=\"2950\"\u003eFurnace attempts ignition then shuts down\u003c\/li\u003e\n\u003cli data-start=\"2953\" data-end=\"2982\"\u003eIntermittent heating occurs\u003c\/li\u003e\n\u003cli data-start=\"2985\" data-end=\"3026\"\u003eAirflow-related fault conditions appear\u003c\/li\u003e\n\u003cli data-start=\"3029\" data-end=\"3076\"\u003eSwitch paddle is bent, stuck, or contaminated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3078\" data-end=\"3163\"\u003eThe sail switch is one of the most common service parts on AF and DF medium furnaces.\u003c\/p\u003e\n\u003chr data-start=\"3165\" data-end=\"3168\"\u003e\n\u003ch2 data-start=\"3170\" data-end=\"3195\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"3197\" data-end=\"3374\"\u003eManufacturer: Dometic \/ Atwood\u003cbr data-start=\"3227\" data-end=\"3230\"\u003ePart Number: 36165\u003cbr data-start=\"3248\" data-end=\"3251\"\u003eComponent: Sail Switch (Low Air Flow Switch)\u003cbr data-start=\"3295\" data-end=\"3298\"\u003eApplication: AF Medium \u0026amp; DF Medium Series\u003cbr data-start=\"3339\" data-end=\"3342\"\u003eIncludes: Sail switch assembly\u003c\/p\u003e\n\u003chr data-start=\"3376\" data-end=\"3379\"\u003e\n\u003ch2 data-start=\"3381\" data-end=\"3416\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"3418\" data-end=\"3526\"\u003e\u003cstrong data-start=\"3418\" data-end=\"3452\"\u003eQ: What does a sail switch do?\u003c\/strong\u003e\u003cbr data-start=\"3452\" data-end=\"3455\"\u003eA: It confirms sufficient airflow before allowing the burner to ignite.\u003c\/p\u003e\n\u003cp data-start=\"3528\" data-end=\"3667\"\u003e\u003cstrong data-start=\"3528\" data-end=\"3587\"\u003eQ: Why does my furnace blower run but no flame appears?\u003c\/strong\u003e\u003cbr data-start=\"3587\" data-end=\"3590\"\u003eA: A faulty sail switch is one of the most common causes of ignition failure.\u003c\/p\u003e\n\u003cp data-start=\"3669\" data-end=\"3839\"\u003e\u003cstrong data-start=\"3669\" data-end=\"3725\"\u003eQ: Why are serial numbers listed for some DF models?\u003c\/strong\u003e\u003cbr data-start=\"3725\" data-end=\"3728\"\u003eA: Design updates changed switch compatibility. Units below the listed serial numbers require a different part.\u003c\/p\u003e\n\u003cp data-start=\"3841\" data-end=\"3945\"\u003e\u003cstrong data-start=\"3841\" data-end=\"3885\"\u003eQ: Is this an OEM Dometic \/ Atwood part?\u003c\/strong\u003e\u003cbr data-start=\"3885\" data-end=\"3888\"\u003eA: Yes. 36165 is a genuine factory replacement component.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47855082045681,"sku":null,"price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/36165.jpg?v=1772327376"},{"product_id":"dometic-33065-furnace-low-air-flow-switch-mounting-kit-dfsd12-dfsd16-dfsd20","title":"Dometic 33065 Furnace Low Air Flow Switch Mounting Kit – DFSD12 \/ DFSD16 \/ DFSD20 - Special Order","description":"\u003ch2 data-start=\"178\" data-end=\"264\"\u003eDometic 33065 Furnace Low Air Flow Switch Mounting Kit – DFSD12 \/ DFSD16 \/ DFSD20\u003c\/h2\u003e\n\u003cp data-start=\"265\" data-end=\"393\"\u003e\u003cstrong data-start=\"265\" data-end=\"321\"\u003eSpecial Order Item (7–14 Business Days for Shipping)\u003c\/strong\u003e\u003cbr data-start=\"321\" data-end=\"324\"\u003e\u003cstrong data-start=\"324\" data-end=\"393\"\u003eGenuine OEM Replacement – Mounting Kit Only (Switch Not Included)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"395\" data-end=\"573\"\u003e\u003cstrong data-start=\"395\" data-end=\"411\"\u003ePart Number:\u003c\/strong\u003e 33065\u003cbr data-start=\"417\" data-end=\"420\"\u003e\u003cstrong data-start=\"420\" data-end=\"437\"\u003eProduct Type:\u003c\/strong\u003e Sail Switch Mounting Kit\u003cbr data-start=\"462\" data-end=\"465\"\u003e\u003cstrong data-start=\"465\" data-end=\"481\"\u003eApplication:\u003c\/strong\u003e Dometic DFSD12, DFSD16 \u0026amp; DFSD20 Furnaces\u003cbr data-start=\"522\" data-end=\"525\"\u003e\u003cstrong data-start=\"525\" data-end=\"538\"\u003eIncludes:\u003c\/strong\u003e Mounting hardware only (No switch)\u003c\/p\u003e\n\u003chr data-start=\"575\" data-end=\"578\"\u003e\n\u003ch2 data-start=\"580\" data-end=\"599\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"601\" data-end=\"790\"\u003eThe \u003cstrong data-start=\"605\" data-end=\"663\"\u003eDometic 33065 Furnace Low Air Flow Switch Mounting Kit\u003c\/strong\u003e is a genuine OEM hardware kit designed for securing the sail switch assembly in select \u003cstrong data-start=\"751\" data-end=\"789\"\u003eDometic DFSD small-series furnaces\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"792\" data-end=\"949\"\u003eThis kit includes the proper mounting components required for installation of the low air flow (sail) switch but \u003cstrong data-start=\"905\" data-end=\"948\"\u003edoes NOT include the sail switch itself\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"951\" data-end=\"1174\"\u003eIf your mounting bracket, screws, or support hardware are damaged, corroded, or missing during service, Part 33065 restores proper positioning and alignment of the airflow switch to ensure accurate blower airflow detection.\u003c\/p\u003e\n\u003cp data-start=\"1176\" data-end=\"1318\"\u003eManufactured to original equipment specifications, this mounting kit ensures precise fitment and reliable operation of the sail switch system.\u003c\/p\u003e\n\u003cp data-start=\"1320\" data-end=\"1418\"\u003e\u003cstrong data-start=\"1320\" data-end=\"1336\"\u003ePlease Note:\u003c\/strong\u003e This is a \u003cem data-start=\"1347\" data-end=\"1362\"\u003eSpecial Order\u003c\/em\u003e part and typically ships within \u003cstrong data-start=\"1395\" data-end=\"1417\"\u003e7–14 business days\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1420\" data-end=\"1423\"\u003e\n\u003ch2 data-start=\"1425\" data-end=\"1440\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1444\" data-end=\"1482\"\u003eGenuine OEM Dometic replacement part\u003c\/li\u003e\n\u003cli data-start=\"1485\" data-end=\"1540\"\u003eDesigned for DFSD12, DFSD16 and DFSD20 furnace models\u003c\/li\u003e\n\u003cli data-start=\"1543\" data-end=\"1599\"\u003eProvides proper mounting and alignment for sail switch\u003c\/li\u003e\n\u003cli data-start=\"1602\" data-end=\"1650\"\u003eRestores correct airflow detection positioning\u003c\/li\u003e\n\u003cli data-start=\"1653\" data-end=\"1685\"\u003eDurable, factory-spec hardware\u003c\/li\u003e\n\u003cli data-start=\"1688\" data-end=\"1714\"\u003eSail switch not included\u003c\/li\u003e\n\u003cli data-start=\"1717\" data-end=\"1769\"\u003eSpecial Order item (7–14 business days for shipping)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1771\" data-end=\"1774\"\u003e\n\u003ch2 data-start=\"1776\" data-end=\"1804\"\u003eCompatible Furnace Models\u003c\/h2\u003e\n\u003cp data-start=\"1806\" data-end=\"1840\"\u003ePart \u003cstrong data-start=\"1811\" data-end=\"1820\"\u003e33065\u003c\/strong\u003e is compatible with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1844\" data-end=\"1852\"\u003eDFSD12\u003c\/li\u003e\n\u003cli data-start=\"1855\" data-end=\"1863\"\u003eDFSD16\u003c\/li\u003e\n\u003cli data-start=\"1866\" data-end=\"1874\"\u003eDFSD20\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote data-start=\"1876\" data-end=\"1934\"\u003e\n\u003cp data-start=\"1878\" data-end=\"1934\"\u003eAlways verify your furnace model number before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1936\" data-end=\"1939\"\u003e\n\u003ch2 data-start=\"1941\" data-end=\"1958\"\u003eImportant Note\u003c\/h2\u003e\n\u003cp data-start=\"1960\" data-end=\"2092\"\u003eThis listing is for the \u003cstrong data-start=\"1984\" data-end=\"2005\"\u003emounting kit only\u003c\/strong\u003e.\u003cbr data-start=\"2006\" data-end=\"2009\"\u003eIf you need the low air flow switch (sail switch), it must be purchased separately.\u003c\/p\u003e\n\u003chr data-start=\"2094\" data-end=\"2097\"\u003e\n\u003ch2 data-start=\"2099\" data-end=\"2131\"\u003eWhen Would You Need This Kit?\u003c\/h2\u003e\n\u003cp data-start=\"2133\" data-end=\"2167\"\u003eYou may need this mounting kit if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2171\" data-end=\"2212\"\u003eReplacing a damaged or corroded bracket\u003c\/li\u003e\n\u003cli data-start=\"2215\" data-end=\"2249\"\u003eHardware was lost during service\u003c\/li\u003e\n\u003cli data-start=\"2252\" data-end=\"2288\"\u003eSail switch alignment is incorrect\u003c\/li\u003e\n\u003cli data-start=\"2291\" data-end=\"2341\"\u003eFurnace airflow faults occur due to misalignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2343\" data-end=\"2418\"\u003eProper sail switch positioning is critical for correct ignition sequencing.\u003c\/p\u003e\n\u003chr data-start=\"2420\" data-end=\"2423\"\u003e\n\u003ch2 data-start=\"2425\" data-end=\"2450\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2452\" data-end=\"2699\"\u003eManufacturer: Dometic\u003cbr data-start=\"2473\" data-end=\"2476\"\u003ePart Number: 33065\u003cbr data-start=\"2494\" data-end=\"2497\"\u003eComponent: Sail Switch Mounting Kit\u003cbr data-start=\"2532\" data-end=\"2535\"\u003eApplication: DFSD12, DFSD16, DFSD20\u003cbr data-start=\"2570\" data-end=\"2573\"\u003eIncludes: Mounting hardware only\u003cbr data-start=\"2605\" data-end=\"2608\"\u003eDoes Not Include: Sail switch assembly\u003cbr data-start=\"2646\" data-end=\"2649\"\u003eAvailability: Special Order – 7–14 Business Days\u003c\/p\u003e\n\u003chr data-start=\"2701\" data-end=\"2704\"\u003e\n\u003ch2 data-start=\"2706\" data-end=\"2741\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"2743\" data-end=\"2877\"\u003e\u003cstrong data-start=\"2743\" data-end=\"2784\"\u003eQ: Does this include the sail switch?\u003c\/strong\u003e\u003cbr data-start=\"2784\" data-end=\"2787\"\u003eA: No. This listing is for the mounting kit only. The switch must be purchased separately.\u003c\/p\u003e\n\u003cp data-start=\"2879\" data-end=\"3071\"\u003e\u003cstrong data-start=\"2879\" data-end=\"2919\"\u003eQ: Why is this marked Special Order?\u003c\/strong\u003e\u003cbr data-start=\"2919\" data-end=\"2922\"\u003eA: This item is not typically stocked for immediate shipment and must be ordered from the distributor. Estimated shipping time is 7–14 business days.\u003c\/p\u003e\n\u003cp data-start=\"3073\" data-end=\"3163\"\u003e\u003cstrong data-start=\"3073\" data-end=\"3123\"\u003eQ: Which furnace models use this mounting kit?\u003c\/strong\u003e\u003cbr data-start=\"3123\" data-end=\"3126\"\u003eA: DFSD12, DFSD16, and DFSD20 models.\u003c\/p\u003e\n\u003cp data-start=\"3165\" data-end=\"3257\"\u003e\u003cstrong data-start=\"3165\" data-end=\"3192\"\u003eQ: Is this an OEM part?\u003c\/strong\u003e\u003cbr data-start=\"3192\" data-end=\"3195\"\u003eA: Yes. Part 33065 is a genuine Dometic replacement component.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857362305265,"sku":null,"price":19.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/33065.jpg?v=1772378045"},{"product_id":"m-c-enterprises-31377mc-furnace-low-air-flow-switch-sail-switch","title":"M.C. Enterprises 31377MC Furnace Low Air Flow Switch (Sail Switch)","description":"\u003ch2 data-start=\"167\" data-end=\"238\"\u003eM.C. Enterprises 31377MC Furnace Low Air Flow Switch (Sail Switch)\u003c\/h2\u003e\n\u003cp data-start=\"239\" data-end=\"293\"\u003e\u003cstrong data-start=\"239\" data-end=\"293\"\u003eAftermarket Replacement for Dometic \/ Atwood 31377\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"295\" data-end=\"478\"\u003e\u003cstrong data-start=\"295\" data-end=\"311\"\u003ePart Number:\u003c\/strong\u003e 31377MC\u003cbr data-start=\"319\" data-end=\"322\"\u003e\u003cstrong data-start=\"322\" data-end=\"335\"\u003eReplaces:\u003c\/strong\u003e Dometic \/ Atwood 31377\u003cbr data-start=\"358\" data-end=\"361\"\u003e\u003cstrong data-start=\"361\" data-end=\"378\"\u003eProduct Type:\u003c\/strong\u003e Furnace Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"420\" data-end=\"423\"\u003e\u003cstrong data-start=\"423\" data-end=\"439\"\u003eApplication:\u003c\/strong\u003e Atwood \u0026amp; Dometic HydroFlame Furnaces\u003c\/p\u003e\n\u003chr data-start=\"480\" data-end=\"483\"\u003e\n\u003ch2 data-start=\"485\" data-end=\"504\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"506\" data-end=\"665\"\u003eThe \u003cstrong data-start=\"510\" data-end=\"566\"\u003eM.C. Enterprises 31377MC Furnace Low Air Flow Switch\u003c\/strong\u003e is a high-quality aftermarket replacement designed to replace \u003cstrong data-start=\"629\" data-end=\"664\"\u003eDometic \/ Atwood OEM Part 31377\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"667\" data-end=\"900\"\u003eAlso known as a \u003cstrong data-start=\"683\" data-end=\"698\"\u003esail switch\u003c\/strong\u003e, this component verifies adequate blower airflow before permitting the furnace ignition sequence. If proper airflow is not detected, the switch prevents ignition to protect against improper combustion.\u003c\/p\u003e\n\u003cp data-start=\"902\" data-end=\"1066\"\u003eIf your RV furnace blower runs but the burner will not ignite, cycles erratically, or shuts down prematurely, a failed sail switch is one of the most common causes.\u003c\/p\u003e\n\u003cp data-start=\"1068\" data-end=\"1224\"\u003eReplacing your original 31377 sail switch with the 31377MC restores proper ignition sequencing, stable airflow monitoring, and reliable heating performance.\u003c\/p\u003e\n\u003cp data-start=\"1226\" data-end=\"1390\"\u003eManufactured by M.C. Enterprises, this component provides dependable performance and direct-fit compatibility for a wide range of Atwood and Dometic furnace models.\u003c\/p\u003e\n\u003chr data-start=\"1392\" data-end=\"1395\"\u003e\n\u003ch2 data-start=\"1397\" data-end=\"1412\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1416\" data-end=\"1475\"\u003eDirect aftermarket replacement for Dometic \/ Atwood 31377\u003c\/li\u003e\n\u003cli data-start=\"1478\" data-end=\"1512\"\u003eVerifies airflow before ignition\u003c\/li\u003e\n\u003cli data-start=\"1515\" data-end=\"1563\"\u003eHelps resolve “blower runs but no heat” issues\u003c\/li\u003e\n\u003cli data-start=\"1566\" data-end=\"1603\"\u003eRestores proper ignition sequencing\u003c\/li\u003e\n\u003cli data-start=\"1606\" data-end=\"1655\"\u003eDirect-fit design for compatible furnace models\u003c\/li\u003e\n\u003cli data-start=\"1658\" data-end=\"1693\"\u003eCost-effective alternative to OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1695\" data-end=\"1698\"\u003e\n\u003ch1 data-start=\"1700\" data-end=\"1727\"\u003eCompatible Furnace Models\u003c\/h1\u003e\n\u003chr data-start=\"1729\" data-end=\"1732\"\u003e\n\u003ch2 data-start=\"1734\" data-end=\"1758\"\u003e7900 \u0026amp; 7900-II Series\u003c\/h2\u003e\n\u003cp data-start=\"1760\" data-end=\"1776\"\u003e7912\u003cbr data-start=\"1764\" data-end=\"1767\"\u003e7912-II\u003c\/p\u003e\n\u003cp data-start=\"1778\" data-end=\"1794\"\u003e7916\u003cbr data-start=\"1782\" data-end=\"1785\"\u003e7916-II\u003c\/p\u003e\n\u003cp data-start=\"1796\" data-end=\"1812\"\u003e7920\u003cbr data-start=\"1800\" data-end=\"1803\"\u003e7920-II\u003c\/p\u003e\n\u003chr data-start=\"1814\" data-end=\"1817\"\u003e\n\u003ch2 data-start=\"1819\" data-end=\"1833\"\u003e8500 Series\u003c\/h2\u003e\n\u003cp data-start=\"1835\" data-end=\"1872\"\u003e8516\u003cbr data-start=\"1839\" data-end=\"1842\"\u003e8516-II\u003cbr data-start=\"1849\" data-end=\"1852\"\u003e8516-III\u003cbr data-start=\"1860\" data-end=\"1863\"\u003e8516-IV\u003c\/p\u003e\n\u003cp data-start=\"1874\" data-end=\"1911\"\u003e8520\u003cbr data-start=\"1878\" data-end=\"1881\"\u003e8520-II\u003cbr data-start=\"1888\" data-end=\"1891\"\u003e8520-III\u003cbr data-start=\"1899\" data-end=\"1902\"\u003e8520-IV\u003c\/p\u003e\n\u003cp data-start=\"1913\" data-end=\"1950\"\u003e8525\u003cbr data-start=\"1917\" data-end=\"1920\"\u003e8525-II\u003cbr data-start=\"1927\" data-end=\"1930\"\u003e8525-III\u003cbr data-start=\"1938\" data-end=\"1941\"\u003e8525-IV\u003c\/p\u003e\n\u003cp data-start=\"1952\" data-end=\"1989\"\u003e8531\u003cbr data-start=\"1956\" data-end=\"1959\"\u003e8531-II\u003cbr data-start=\"1966\" data-end=\"1969\"\u003e8531-III\u003cbr data-start=\"1977\" data-end=\"1980\"\u003e8531-IV\u003c\/p\u003e\n\u003cp data-start=\"1991\" data-end=\"2028\"\u003e8535\u003cbr data-start=\"1995\" data-end=\"1998\"\u003e8535-II\u003cbr data-start=\"2005\" data-end=\"2008\"\u003e8535-III\u003cbr data-start=\"2016\" data-end=\"2019\"\u003e8535-IV\u003c\/p\u003e\n\u003chr data-start=\"2030\" data-end=\"2033\"\u003e\n\u003ch2 data-start=\"2035\" data-end=\"2049\"\u003e8900 Series\u003c\/h2\u003e\n\u003ch3 data-start=\"2051\" data-end=\"2066\"\u003e8935 Models\u003c\/h3\u003e\n\u003cp data-start=\"2067\" data-end=\"2144\"\u003e8935-DC-I\u003cbr data-start=\"2076\" data-end=\"2079\"\u003e8935-AC-I\u003cbr data-start=\"2088\" data-end=\"2091\"\u003e8935-DC-II\u003cbr data-start=\"2101\" data-end=\"2104\"\u003e8935-AC-II\u003cbr data-start=\"2114\" data-end=\"2117\"\u003e8935-DC-III\u003cbr data-start=\"2128\" data-end=\"2131\"\u003e8935-AC-III\u003c\/p\u003e\n\u003ch3 data-start=\"2146\" data-end=\"2161\"\u003e8940 Models\u003c\/h3\u003e\n\u003cp data-start=\"2162\" data-end=\"2239\"\u003e8940-DC-I\u003cbr data-start=\"2171\" data-end=\"2174\"\u003e8940-AC-I\u003cbr data-start=\"2183\" data-end=\"2186\"\u003e8940-DC-II\u003cbr data-start=\"2196\" data-end=\"2199\"\u003e8940-AC-II\u003cbr data-start=\"2209\" data-end=\"2212\"\u003e8940-DC-III\u003cbr data-start=\"2223\" data-end=\"2226\"\u003e8940-AC-III\u003c\/p\u003e\n\u003chr data-start=\"2241\" data-end=\"2244\"\u003e\n\u003cblockquote data-start=\"2246\" data-end=\"2346\"\u003e\n\u003cp data-start=\"2248\" data-end=\"2346\"\u003eAlways verify your furnace model number and confirm it originally used Part 31377 before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"2348\" data-end=\"2351\"\u003e\n\u003ch2 data-start=\"2353\" data-end=\"2396\"\u003eWhen Should You Replace the Sail Switch?\u003c\/h2\u003e\n\u003cp data-start=\"2398\" data-end=\"2441\"\u003eYou may need to replace the sail switch if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2445\" data-end=\"2491\"\u003eBlower motor runs but burner does not ignite\u003c\/li\u003e\n\u003cli data-start=\"2494\" data-end=\"2537\"\u003eFurnace attempts ignition then shuts down\u003c\/li\u003e\n\u003cli data-start=\"2540\" data-end=\"2565\"\u003eHeating is intermittent\u003c\/li\u003e\n\u003cli data-start=\"2568\" data-end=\"2601\"\u003eAirflow-related shutdown occurs\u003c\/li\u003e\n\u003cli data-start=\"2604\" data-end=\"2644\"\u003ePaddle is stuck, bent, or contaminated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2646\" data-end=\"2725\"\u003eThe sail switch is one of the most common service parts in HydroFlame furnaces.\u003c\/p\u003e\n\u003chr data-start=\"2727\" data-end=\"2730\"\u003e\n\u003ch2 data-start=\"2732\" data-end=\"2757\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2759\" data-end=\"2978\"\u003eManufacturer: M.C. Enterprises\u003cbr data-start=\"2789\" data-end=\"2792\"\u003ePart Number: 31377MC\u003cbr data-start=\"2812\" data-end=\"2815\"\u003eReplaces: Dometic \/ Atwood 31377\u003cbr data-start=\"2847\" data-end=\"2850\"\u003eComponent: Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"2894\" data-end=\"2897\"\u003eApplication: 7900, 8500 \u0026amp; 8900 Series Furnaces\u003cbr data-start=\"2943\" data-end=\"2946\"\u003eIncludes: Sail switch assembly\u003c\/p\u003e\n\u003chr data-start=\"2980\" data-end=\"2983\"\u003e\n\u003ch2 data-start=\"2985\" data-end=\"3020\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"3022\" data-end=\"3164\"\u003e\u003cstrong data-start=\"3022\" data-end=\"3057\"\u003eQ: Is this an OEM Dometic part?\u003c\/strong\u003e\u003cbr data-start=\"3057\" data-end=\"3060\"\u003eA: No. This is an aftermarket replacement manufactured by M.C. Enterprises that replaces OEM part 31377.\u003c\/p\u003e\n\u003cp data-start=\"3166\" data-end=\"3272\"\u003e\u003cstrong data-start=\"3166\" data-end=\"3200\"\u003eQ: What does a sail switch do?\u003c\/strong\u003e\u003cbr data-start=\"3200\" data-end=\"3203\"\u003eA: It confirms adequate airflow before allowing the burner to ignite.\u003c\/p\u003e\n\u003cp data-start=\"3274\" data-end=\"3422\"\u003e\u003cstrong data-start=\"3274\" data-end=\"3348\"\u003eQ: Will this fix a furnace where the blower runs but no flame appears?\u003c\/strong\u003e\u003cbr data-start=\"3348\" data-end=\"3351\"\u003eA: A failed sail switch is one of the most common causes of that issue.\u003c\/p\u003e\n\u003cp data-start=\"3424\" data-end=\"3573\"\u003e\u003cstrong data-start=\"3424\" data-end=\"3477\"\u003eQ: Is this compatible with both AC and DC models?\u003c\/strong\u003e\u003cbr data-start=\"3477\" data-end=\"3480\"\u003eA: Yes, as listed above, it fits applicable AC and DC 8900 models that originally used 31377.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857554161905,"sku":null,"price":12.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/31377sailswitchMC.jpg?v=1772392704"},{"product_id":"dometic-atwood-33082-furnace-low-air-flow-switch-sail-switch-with-bracket-afm-afla-afld-dfmd-series-post-serial-specific","title":"Dometic \/ Atwood 33082 Furnace Low Air Flow Switch – Sail Switch – With Bracket - AFM, AFLA, AFLD, DFMD Series (Post-Serial Specific)","description":"\u003ch2 data-end=\"264\" data-start=\"174\"\u003eDometic \/ Atwood 33082 Furnace Low Air Flow Switch – Sail Switch  – With Bracket\u003c\/h2\u003e\n\u003cp data-end=\"292\" data-start=\"265\"\u003e\u003cstrong data-end=\"292\" data-start=\"265\"\u003eGenuine OEM Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"442\" data-start=\"294\"\u003e\u003cstrong data-end=\"310\" data-start=\"294\"\u003ePart Number:\u003c\/strong\u003e 33082\u003cbr data-end=\"319\" data-start=\"316\"\u003e\u003cstrong data-end=\"336\" data-start=\"319\"\u003eProduct Type:\u003c\/strong\u003e Furnace Low Air Flow Switch (Sail Switch)\u003cbr data-end=\"398\" data-start=\"395\"\u003e\u003cstrong data-end=\"411\" data-start=\"398\"\u003eIncludes:\u003c\/strong\u003e Switch with mounting bracket\u003c\/p\u003e\n\u003chr data-end=\"447\" data-start=\"444\"\u003e\n\u003ch2 data-end=\"468\" data-start=\"449\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-end=\"677\" data-start=\"470\"\u003eThe \u003cstrong data-end=\"528\" data-start=\"474\"\u003eDometic \/ Atwood 33082 Furnace Low Air Flow Switch\u003c\/strong\u003e is a genuine OEM sail switch designed for select \u003cstrong data-end=\"622\" data-start=\"578\"\u003eAFM, AFLD, AFLA and DFMD series furnaces\u003c\/strong\u003e manufactured after specified serial number thresholds.\u003c\/p\u003e\n\u003cp data-end=\"940\" data-start=\"679\"\u003eAlso known as a \u003cstrong data-end=\"710\" data-start=\"695\"\u003esail switch\u003c\/strong\u003e, this component verifies proper blower airflow before allowing the ignition sequence to begin. If the furnace does not detect adequate airflow, the burner will not ignite — protecting the system from unsafe combustion conditions.\u003c\/p\u003e\n\u003cp data-end=\"1094\" data-start=\"942\"\u003eIf your blower runs but the furnace will not ignite, shuts down prematurely, or experiences intermittent heating, a faulty sail switch may be the cause.\u003c\/p\u003e\n\u003cp data-end=\"1210\" data-start=\"1096\"\u003ePart 33082 includes the \u003cstrong data-end=\"1165\" data-start=\"1120\"\u003etan switch assembly with mounting bracket\u003c\/strong\u003e for direct replacement on compatible models.\u003c\/p\u003e\n\u003chr data-end=\"1215\" data-start=\"1212\"\u003e\n\u003ch2 data-end=\"1232\" data-start=\"1217\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-end=\"1283\" data-start=\"1236\"\u003eGenuine OEM Dometic \/ Atwood replacement part\u003c\/li\u003e\n\u003cli data-end=\"1334\" data-start=\"1286\"\u003eIncludes tan sail switch with mounting bracket\u003c\/li\u003e\n\u003cli data-end=\"1371\" data-start=\"1337\"\u003eVerifies airflow before ignition\u003c\/li\u003e\n\u003cli data-end=\"1411\" data-start=\"1374\"\u003eRestores proper ignition sequencing\u003c\/li\u003e\n\u003cli data-end=\"1466\" data-start=\"1414\"\u003eDesigned for serial-number-specific furnace models\u003c\/li\u003e\n\u003cli data-end=\"1493\" data-start=\"1469\"\u003eDirect-fit replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1498\" data-start=\"1495\"\u003e\n\u003ch1 data-end=\"1527\" data-start=\"1500\"\u003eCompatible Furnace Models\u003c\/h1\u003e\n\u003cp data-end=\"1624\" data-start=\"1529\"\u003e⚠ \u003cstrong data-end=\"1545\" data-start=\"1531\"\u003eImportant:\u003c\/strong\u003e Compatible only with units manufactured AFTER the serial numbers listed below.\u003c\/p\u003e\n\u003chr data-end=\"1629\" data-start=\"1626\"\u003e\n\u003ch2 data-end=\"1646\" data-start=\"1631\"\u003eAFM Series\u003c\/h2\u003e\n\u003cp data-end=\"1680\" data-start=\"1647\"\u003e\u003cstrong data-end=\"1680\" data-start=\"1647\"\u003eSerial Numbers AFTER 72489156\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"1741\" data-start=\"1682\"\u003eAFMD25111\u003cbr data-end=\"1694\" data-start=\"1691\"\u003eAFMD25121\u003cbr data-end=\"1706\" data-start=\"1703\"\u003eAFMD25131\u003cbr data-end=\"1718\" data-start=\"1715\"\u003eAFMD25141\u003cbr data-end=\"1730\" data-start=\"1727\"\u003eAFMD25151\u003c\/p\u003e\n\u003cp data-end=\"1802\" data-start=\"1743\"\u003eAFMD30111\u003cbr data-end=\"1755\" data-start=\"1752\"\u003eAFMD30121\u003cbr data-end=\"1767\" data-start=\"1764\"\u003eAFMD30131\u003cbr data-end=\"1779\" data-start=\"1776\"\u003eAFMD30141\u003cbr data-end=\"1791\" data-start=\"1788\"\u003eAFMD30151\u003c\/p\u003e\n\u003cp data-end=\"1863\" data-start=\"1804\"\u003eAFMD35111\u003cbr data-end=\"1816\" data-start=\"1813\"\u003eAFMD35121\u003cbr data-end=\"1828\" data-start=\"1825\"\u003eAFMD35131\u003cbr data-end=\"1840\" data-start=\"1837\"\u003eAFMD35141\u003cbr data-end=\"1852\" data-start=\"1849\"\u003eAFMD35151\u003c\/p\u003e\n\u003chr data-end=\"1868\" data-start=\"1865\"\u003e\n\u003ch2 data-end=\"1886\" data-start=\"1870\"\u003eAFLD Series\u003c\/h2\u003e\n\u003cp data-end=\"1920\" data-start=\"1887\"\u003e\u003cstrong data-end=\"1920\" data-start=\"1887\"\u003eSerial Numbers AFTER 72991127\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"1957\" data-start=\"1922\"\u003eAFLD35111\u003cbr data-end=\"1934\" data-start=\"1931\"\u003eAFLD35121\u003cbr data-end=\"1946\" data-start=\"1943\"\u003eAFLD35131\u003c\/p\u003e\n\u003cp data-end=\"1994\" data-start=\"1959\"\u003eAFLD40111\u003cbr data-end=\"1971\" data-start=\"1968\"\u003eAFLD40121\u003cbr data-end=\"1983\" data-start=\"1980\"\u003eAFLD40131\u003c\/p\u003e\n\u003chr data-end=\"1999\" data-start=\"1996\"\u003e\n\u003ch2 data-end=\"2017\" data-start=\"2001\"\u003eAFLA Series\u003c\/h2\u003e\n\u003cp data-end=\"2051\" data-start=\"2018\"\u003e\u003cstrong data-end=\"2051\" data-start=\"2018\"\u003eSerial Numbers AFTER 81689155\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2088\" data-start=\"2053\"\u003eAFLA35211\u003cbr data-end=\"2065\" data-start=\"2062\"\u003eAFLA35221\u003cbr data-end=\"2077\" data-start=\"2074\"\u003eAFLA35231\u003c\/p\u003e\n\u003cp data-end=\"2125\" data-start=\"2090\"\u003eAFLA40211\u003cbr data-end=\"2102\" data-start=\"2099\"\u003eAFLA40221\u003cbr data-end=\"2114\" data-start=\"2111\"\u003eAFLA40231\u003c\/p\u003e\n\u003chr data-end=\"2130\" data-start=\"2127\"\u003e\n\u003ch2 data-end=\"2148\" data-start=\"2132\"\u003eDFMD Series\u003c\/h2\u003e\n\u003cp data-end=\"2182\" data-start=\"2149\"\u003e\u003cstrong data-end=\"2182\" data-start=\"2149\"\u003eSerial Numbers AFTER 72489156\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2243\" data-start=\"2184\"\u003eDFMD25111\u003cbr data-end=\"2196\" data-start=\"2193\"\u003eDFMD25121\u003cbr data-end=\"2208\" data-start=\"2205\"\u003eDFMD25131\u003cbr data-end=\"2220\" data-start=\"2217\"\u003eDFMD25141\u003cbr data-end=\"2232\" data-start=\"2229\"\u003eDFMD25151\u003c\/p\u003e\n\u003cp data-end=\"2304\" data-start=\"2245\"\u003eDFMD30111\u003cbr data-end=\"2257\" data-start=\"2254\"\u003eDFMD30121\u003cbr data-end=\"2269\" data-start=\"2266\"\u003eDFMD30131\u003cbr data-end=\"2281\" data-start=\"2278\"\u003eDFMD30141\u003cbr data-end=\"2293\" data-start=\"2290\"\u003eDFMD30151\u003c\/p\u003e\n\u003cp data-end=\"2365\" data-start=\"2306\"\u003eDFMD35111\u003cbr data-end=\"2318\" data-start=\"2315\"\u003eDFMD35121\u003cbr data-end=\"2330\" data-start=\"2327\"\u003eDFMD35131\u003cbr data-end=\"2342\" data-start=\"2339\"\u003eDFMD35141\u003cbr data-end=\"2354\" data-start=\"2351\"\u003eDFMD35151\u003c\/p\u003e\n\u003chr data-end=\"2370\" data-start=\"2367\"\u003e\n\u003cblockquote data-end=\"2453\" data-start=\"2372\"\u003e\n\u003cp data-end=\"2453\" data-start=\"2374\"\u003eAlways verify BOTH your furnace model number and serial number before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-end=\"2458\" data-start=\"2455\"\u003e\n\u003ch2 data-end=\"2503\" data-start=\"2460\"\u003eWhen Should You Replace the Sail Switch?\u003c\/h2\u003e\n\u003cp data-end=\"2547\" data-start=\"2505\"\u003eYou may need to replace this component if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"2599\" data-start=\"2551\"\u003eFurnace blower runs but burner will not ignite\u003c\/li\u003e\n\u003cli data-end=\"2645\" data-start=\"2602\"\u003eFurnace cycles off shortly after starting\u003c\/li\u003e\n\u003cli data-end=\"2678\" data-start=\"2648\"\u003eIntermittent ignition occurs\u003c\/li\u003e\n\u003cli data-end=\"2726\" data-start=\"2681\"\u003eAirflow-related shutdown faults are present\u003c\/li\u003e\n\u003cli data-end=\"2767\" data-start=\"2729\"\u003eSwitch paddle is sticking or damaged\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2863\" data-start=\"2769\"\u003eThe sail switch is one of the most common wear components in modern Dometic \/ Atwood furnaces.\u003c\/p\u003e\n\u003chr data-end=\"2868\" data-start=\"2865\"\u003e\n\u003ch2 data-end=\"2895\" data-start=\"2870\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-end=\"3118\" data-start=\"2897\"\u003eManufacturer: Dometic \/ Atwood\u003cbr data-end=\"2930\" data-start=\"2927\"\u003ePart Number: 33082\u003cbr data-end=\"2951\" data-start=\"2948\"\u003eComponent: Low Air Flow Switch (Sail Switch)\u003cbr data-end=\"2998\" data-start=\"2995\"\u003eColor: Tan\u003cbr data-end=\"3011\" data-start=\"3008\"\u003eIncludes: Switch with mounting bracket\u003cbr data-end=\"3052\" data-start=\"3049\"\u003eApplication: AFM, AFLA, AFLD, DFMD Series (Post-Serial Specific)\u003c\/p\u003e\n\u003chr data-end=\"3123\" data-start=\"3120\"\u003e\n\u003ch2 data-end=\"3160\" data-start=\"3125\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-end=\"3312\" data-start=\"3162\"\u003e\u003cstrong data-end=\"3203\" data-start=\"3162\"\u003eQ: Why does the serial number matter?\u003c\/strong\u003e\u003cbr data-end=\"3206\" data-start=\"3203\"\u003eA: Furnace designs changed after specific production runs, requiring different sail switch configurations.\u003c\/p\u003e\n\u003cp data-end=\"3453\" data-start=\"3314\"\u003e\u003cstrong data-end=\"3369\" data-start=\"3314\"\u003eQ: What happens if I install the wrong sail switch?\u003c\/strong\u003e\u003cbr data-end=\"3372\" data-start=\"3369\"\u003eA: The ignition sequence may not complete, or the switch may not mount correctly.\u003c\/p\u003e\n\u003cp data-end=\"3558\" data-start=\"3455\"\u003e\u003cstrong data-end=\"3489\" data-start=\"3455\"\u003eQ: What does a sail switch do?\u003c\/strong\u003e\u003cbr data-end=\"3492\" data-start=\"3489\"\u003eA: It confirms sufficient blower airflow before allowing ignition.\u003c\/p\u003e\n\u003cp data-end=\"3655\" data-start=\"3560\"\u003e\u003cstrong data-end=\"3595\" data-start=\"3560\"\u003eQ: Is this an OEM Dometic part?\u003c\/strong\u003e\u003cbr data-end=\"3598\" data-start=\"3595\"\u003eA: Yes. 33082 is a genuine factory replacement component.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857557504241,"sku":null,"price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/33082.jpg?v=1772393011"},{"product_id":"m-c-enterprises-31094mc-aftermarket-rv-furnace-air-flow-sail-switch","title":"M.C. Enterprises 31094MC Aftermarket RV Furnace Air Flow Sail Switch","description":"\u003ch2 data-start=\"164\" data-end=\"237\"\u003eM.C. Enterprises 31094MC Aftermarket RV Furnace Air Flow Sail Switch\u003c\/h2\u003e\n\u003cp data-start=\"238\" data-end=\"274\"\u003e\u003cstrong data-start=\"238\" data-end=\"274\"\u003eReplaces Dometic™ \/ Atwood 31094\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"276\" data-end=\"471\"\u003e\u003cstrong data-start=\"276\" data-end=\"292\"\u003ePart Number:\u003c\/strong\u003e 31094MC\u003cbr data-start=\"300\" data-end=\"303\"\u003e\u003cstrong data-start=\"303\" data-end=\"320\"\u003eManufacturer:\u003c\/strong\u003e M.C. Enterprises\u003cbr data-start=\"337\" data-end=\"340\"\u003e\u003cstrong data-start=\"340\" data-end=\"357\"\u003eProduct Type:\u003c\/strong\u003e Furnace Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"399\" data-end=\"402\"\u003e\u003cstrong data-start=\"402\" data-end=\"418\"\u003eApplication:\u003c\/strong\u003e Dometic™ \/ Atwood AFSD, AFMD, AFLA \u0026amp; AFLD Furnaces\u003c\/p\u003e\n\u003chr data-start=\"473\" data-end=\"476\"\u003e\n\u003ch2 data-start=\"478\" data-end=\"497\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"499\" data-end=\"641\"\u003eThe \u003cstrong data-start=\"503\" data-end=\"563\"\u003eM.C. Enterprises 31094MC RV Furnace Air Flow Sail Switch\u003c\/strong\u003e is a direct aftermarket replacement for \u003cstrong data-start=\"604\" data-end=\"640\"\u003eDometic™ \/ Atwood OEM Part 31094\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"643\" data-end=\"945\"\u003eAlso referred to as a \u003cstrong data-start=\"665\" data-end=\"688\"\u003elow air flow switch\u003c\/strong\u003e, this sail switch monitors blower airflow and prevents ignition unless proper air movement is detected inside the combustion chamber. If adequate airflow is not present, the furnace will not ignite — protecting the system from unsafe combustion conditions.\u003c\/p\u003e\n\u003cp data-start=\"947\" data-end=\"1116\"\u003eIf your RV furnace blower runs but the burner does not light, ignition is intermittent, or heating cycles prematurely shut down, a faulty sail switch is often the cause.\u003c\/p\u003e\n\u003cp data-start=\"1118\" data-end=\"1246\"\u003eThe 31094MC provides a dependable, cost-effective replacement solution for compatible AFSD, AFMD, AFLA, and AFLD furnace models.\u003c\/p\u003e\n\u003chr data-start=\"1248\" data-end=\"1251\"\u003e\n\u003ch2 data-start=\"1253\" data-end=\"1268\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1270\" data-end=\"1549\"\u003e\n\u003cli data-start=\"1270\" data-end=\"1325\"\u003e\n\u003cp data-start=\"1272\" data-end=\"1325\"\u003eAftermarket replacement for Dometic™ \/ Atwood 31094\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1326\" data-end=\"1369\"\u003e\n\u003cp data-start=\"1328\" data-end=\"1369\"\u003eVerifies blower airflow before ignition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1370\" data-end=\"1416\"\u003e\n\u003cp data-start=\"1372\" data-end=\"1416\"\u003eHelps fix “blower runs but no heat” issues\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1417\" data-end=\"1456\"\u003e\n\u003cp data-start=\"1419\" data-end=\"1456\"\u003eRestores proper ignition sequencing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1457\" data-end=\"1511\"\u003e\n\u003cp data-start=\"1459\" data-end=\"1511\"\u003eDirect-fit compatibility for listed furnace models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1512\" data-end=\"1549\"\u003e\n\u003cp data-start=\"1514\" data-end=\"1549\"\u003eCost-effective alternative to OEM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1551\" data-end=\"1554\"\u003e\n\u003ch1 data-start=\"1556\" data-end=\"1583\"\u003eCompatible Furnace Models\u003c\/h1\u003e\n\u003chr data-start=\"1585\" data-end=\"1588\"\u003e\n\u003ch2 data-start=\"1590\" data-end=\"1604\"\u003eAFSD Series\u003c\/h2\u003e\n\u003cp data-start=\"1606\" data-end=\"1617\"\u003eAFSD20111\u003c\/p\u003e\n\u003chr data-start=\"1619\" data-end=\"1622\"\u003e\n\u003ch2 data-start=\"1624\" data-end=\"1638\"\u003eAFMD Series\u003c\/h2\u003e\n\u003cp data-start=\"1640\" data-end=\"1699\"\u003eAFMD25111\u003cbr data-start=\"1649\" data-end=\"1652\"\u003eAFMD25121\u003cbr data-start=\"1661\" data-end=\"1664\"\u003eAFMD25131\u003cbr data-start=\"1673\" data-end=\"1676\"\u003eAFMD25141\u003cbr data-start=\"1685\" data-end=\"1688\"\u003eAFMD25151\u003c\/p\u003e\n\u003cp data-start=\"1701\" data-end=\"1760\"\u003eAFMD30111\u003cbr data-start=\"1710\" data-end=\"1713\"\u003eAFMD30121\u003cbr data-start=\"1722\" data-end=\"1725\"\u003eAFMD30131\u003cbr data-start=\"1734\" data-end=\"1737\"\u003eAFMD30141\u003cbr data-start=\"1746\" data-end=\"1749\"\u003eAFMD30151\u003c\/p\u003e\n\u003cp data-start=\"1762\" data-end=\"1821\"\u003eAFMD35111\u003cbr data-start=\"1771\" data-end=\"1774\"\u003eAFMD35121\u003cbr data-start=\"1783\" data-end=\"1786\"\u003eAFMD35131\u003cbr data-start=\"1795\" data-end=\"1798\"\u003eAFMD35141\u003cbr data-start=\"1807\" data-end=\"1810\"\u003eAFMD35151\u003c\/p\u003e\n\u003chr data-start=\"1823\" data-end=\"1826\"\u003e\n\u003ch2 data-start=\"1828\" data-end=\"1842\"\u003eAFLA Series\u003c\/h2\u003e\n\u003cp data-start=\"1844\" data-end=\"1879\"\u003eAFLA35211\u003cbr data-start=\"1853\" data-end=\"1856\"\u003eAFLA35221\u003cbr data-start=\"1865\" data-end=\"1868\"\u003eAFLA35231\u003c\/p\u003e\n\u003cp data-start=\"1881\" data-end=\"1916\"\u003eAFLA40211\u003cbr data-start=\"1890\" data-end=\"1893\"\u003eAFLA40221\u003cbr data-start=\"1902\" data-end=\"1905\"\u003eAFLA40231\u003c\/p\u003e\n\u003cp data-start=\"1918\" data-end=\"1929\"\u003eAFLD35111\u003c\/p\u003e\n\u003chr data-start=\"1931\" data-end=\"1934\"\u003e\n\u003ch2 data-start=\"1936\" data-end=\"1950\"\u003eAFLD Series\u003c\/h2\u003e\n\u003cp data-start=\"1952\" data-end=\"1975\"\u003eAFLD35121\u003cbr data-start=\"1961\" data-end=\"1964\"\u003eAFLD35131\u003c\/p\u003e\n\u003cp data-start=\"1977\" data-end=\"2025\"\u003eAFLD40111\u003cbr data-start=\"1986\" data-end=\"1989\"\u003eAFLD40121\u003cbr data-start=\"1998\" data-end=\"2001\"\u003eAFLD40121W\u003cbr data-start=\"2011\" data-end=\"2014\"\u003eAFLD40131\u003c\/p\u003e\n\u003chr data-start=\"2027\" data-end=\"2030\"\u003e\n\u003cblockquote data-start=\"2032\" data-end=\"2132\"\u003e\n\u003cp data-start=\"2034\" data-end=\"2132\"\u003eAlways verify your furnace model number and confirm it originally used part 31094 before ordering.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"2134\" data-end=\"2137\"\u003e\n\u003ch2 data-start=\"2139\" data-end=\"2182\"\u003eWhen Should You Replace the Sail Switch?\u003c\/h2\u003e\n\u003cp data-start=\"2184\" data-end=\"2227\"\u003eYou may need to replace the sail switch if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2231\" data-end=\"2279\"\u003eFurnace blower runs but burner will not ignite\u003c\/li\u003e\n\u003cli data-start=\"2282\" data-end=\"2324\"\u003eFurnace attempts ignition but shuts down\u003c\/li\u003e\n\u003cli data-start=\"2327\" data-end=\"2352\"\u003eHeating is intermittent\u003c\/li\u003e\n\u003cli data-start=\"2355\" data-end=\"2396\"\u003eAirflow-related ignition lockout occurs\u003c\/li\u003e\n\u003cli data-start=\"2399\" data-end=\"2444\"\u003eSail paddle is bent, stuck, or contaminated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2446\" data-end=\"2523\"\u003eThe sail switch is one of the most frequently replaced RV furnace components.\u003c\/p\u003e\n\u003chr data-start=\"2525\" data-end=\"2528\"\u003e\n\u003ch2 data-start=\"2530\" data-end=\"2555\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2557\" data-end=\"2782\"\u003eManufacturer: M.C. Enterprises\u003cbr data-start=\"2587\" data-end=\"2590\"\u003ePart Number: 31094MC\u003cbr data-start=\"2610\" data-end=\"2613\"\u003eReplaces: Dometic™ \/ Atwood 31094\u003cbr data-start=\"2646\" data-end=\"2649\"\u003eComponent: Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"2693\" data-end=\"2696\"\u003eApplication: AFSD, AFMD, AFLA \u0026amp; AFLD Series Furnaces\u003cbr data-start=\"2748\" data-end=\"2751\"\u003eType: Aftermarket Replacement\u003c\/p\u003e\n\u003chr data-start=\"2784\" data-end=\"2787\"\u003e\n\u003ch2 data-start=\"2789\" data-end=\"2824\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"2826\" data-end=\"2940\"\u003e\u003cstrong data-start=\"2826\" data-end=\"2862\"\u003eQ: Is this an OEM Dometic™ part?\u003c\/strong\u003e\u003cbr data-start=\"2862\" data-end=\"2865\"\u003eA: No. This is an aftermarket replacement manufactured by M.C. Enterprises.\u003c\/p\u003e\n\u003cp data-start=\"2942\" data-end=\"3036\"\u003e\u003cstrong data-start=\"2942\" data-end=\"2976\"\u003eQ: What does a sail switch do?\u003c\/strong\u003e\u003cbr data-start=\"2976\" data-end=\"2979\"\u003eA: It confirms sufficient blower airflow before ignition.\u003c\/p\u003e\n\u003cp data-start=\"3038\" data-end=\"3187\"\u003e\u003cstrong data-start=\"3038\" data-end=\"3113\"\u003eQ: Will this fix a furnace where the blower runs but there is no flame?\u003c\/strong\u003e\u003cbr data-start=\"3113\" data-end=\"3116\"\u003eA: A failed sail switch is one of the most common causes of that issue.\u003c\/p\u003e\n\u003cp data-start=\"3189\" data-end=\"3311\"\u003e\u003cstrong data-start=\"3189\" data-end=\"3227\"\u003eQ: How do I confirm compatibility?\u003c\/strong\u003e\u003cbr data-start=\"3227\" data-end=\"3230\"\u003eA: Verify your furnace model number and check the original part number installed.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857561075953,"sku":null,"price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/31094sailMC.jpg?v=1772393352"},{"product_id":"m-c-enterprises-31093mc-furnace-low-air-flow-switch-sail-switch","title":"M.C. Enterprises 31093MC Furnace Low Air Flow Switch (Sail Switch)","description":"\u003ch2 data-start=\"171\" data-end=\"242\"\u003eM.C. Enterprises 31093MC Furnace Low Air Flow Switch (Sail Switch)\u003c\/h2\u003e\n\u003cp data-start=\"243\" data-end=\"356\"\u003e\u003cstrong data-start=\"243\" data-end=\"326\"\u003eFor Atwood Hydroflame AF Small Series Furnaces – Serial Numbers BEFORE 72498929\u003c\/strong\u003e\u003cbr data-start=\"326\" data-end=\"329\"\u003e\u003cstrong data-start=\"329\" data-end=\"356\"\u003eAftermarket Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"358\" data-end=\"545\"\u003e\u003cstrong data-start=\"358\" data-end=\"374\"\u003ePart Number:\u003c\/strong\u003e 31093MC\u003cbr data-start=\"382\" data-end=\"385\"\u003e\u003cstrong data-start=\"385\" data-end=\"402\"\u003eManufacturer:\u003c\/strong\u003e M.C. Enterprises\u003cbr data-start=\"419\" data-end=\"422\"\u003e\u003cstrong data-start=\"422\" data-end=\"439\"\u003eProduct Type:\u003c\/strong\u003e Furnace Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"481\" data-end=\"484\"\u003e\u003cstrong data-start=\"484\" data-end=\"500\"\u003eApplication:\u003c\/strong\u003e Atwood HydroFlame AF Small Series Furnaces\u003c\/p\u003e\n\u003chr data-start=\"547\" data-end=\"550\"\u003e\n\u003ch2 data-start=\"552\" data-end=\"571\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"573\" data-end=\"780\"\u003eThe \u003cstrong data-start=\"577\" data-end=\"633\"\u003eM.C. Enterprises 31093MC Furnace Low Air Flow Switch\u003c\/strong\u003e is an aftermarket sail switch designed specifically for \u003cstrong data-start=\"690\" data-end=\"779\"\u003eAtwood HydroFlame AF small series furnaces manufactured BEFORE serial number 72498929\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"782\" data-end=\"1031\"\u003eAlso known as a \u003cstrong data-start=\"798\" data-end=\"813\"\u003esail switch\u003c\/strong\u003e, this component verifies proper blower airflow before allowing the furnace ignition sequence to begin. If sufficient airflow is not detected, the burner will not ignite — protecting the furnace from unsafe combustion.\u003c\/p\u003e\n\u003cp data-start=\"1033\" data-end=\"1212\"\u003eIf your RV furnace blower runs but no flame appears, ignition is intermittent, or the unit shuts down shortly after startup, a faulty sail switch is one of the most common causes.\u003c\/p\u003e\n\u003cp data-start=\"1214\" data-end=\"1323\"\u003eThe 31093MC provides a reliable and cost-effective replacement for early-production AF small-series furnaces.\u003c\/p\u003e\n\u003chr data-start=\"1325\" data-end=\"1328\"\u003e\n\u003ch2 data-start=\"1330\" data-end=\"1365\"\u003e⚠ Important Compatibility Notice\u003c\/h2\u003e\n\u003cp data-start=\"1367\" data-end=\"1464\"\u003eThis sail switch is \u003cstrong data-start=\"1387\" data-end=\"1464\"\u003eONLY compatible with furnaces manufactured BEFORE Serial Number 72498929.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1466\" data-end=\"1545\"\u003eAlways verify both your furnace model number and serial number before ordering.\u003c\/p\u003e\n\u003chr data-start=\"1547\" data-end=\"1550\"\u003e\n\u003ch1 data-start=\"1552\" data-end=\"1581\"\u003eCompatible Furnace Models\u003c\/h1\u003e\n\u003cp data-start=\"1582\" data-end=\"1647\"\u003e\u003cstrong data-start=\"1582\" data-end=\"1647\"\u003eDometic \/ Atwood Furnaces with Serial Numbers BEFORE 72498929\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"1649\" data-end=\"1652\"\u003e\n\u003ch2 data-start=\"1654\" data-end=\"1668\"\u003eAFMD Series\u003c\/h2\u003e\n\u003cp data-start=\"1670\" data-end=\"1729\"\u003eAFMD16111\u003cbr data-start=\"1679\" data-end=\"1682\"\u003eAFMD16121\u003cbr data-start=\"1691\" data-end=\"1694\"\u003eAFMD16131\u003cbr data-start=\"1703\" data-end=\"1706\"\u003eAFMD16141\u003cbr data-start=\"1715\" data-end=\"1718\"\u003eAFMD16151\u003c\/p\u003e\n\u003cp data-start=\"1731\" data-end=\"1790\"\u003eAFMD20111\u003cbr data-start=\"1740\" data-end=\"1743\"\u003eAFMD20121\u003cbr data-start=\"1752\" data-end=\"1755\"\u003eAFMD20131\u003cbr data-start=\"1764\" data-end=\"1767\"\u003eAFMD20141\u003cbr data-start=\"1776\" data-end=\"1779\"\u003eAFMD20151\u003c\/p\u003e\n\u003chr data-start=\"1792\" data-end=\"1795\"\u003e\n\u003ch2 data-start=\"1797\" data-end=\"1812\"\u003eAFSAD Series\u003c\/h2\u003e\n\u003cp data-start=\"1814\" data-end=\"1865\"\u003eAFSAD12111\u003cbr data-start=\"1824\" data-end=\"1827\"\u003eAFSAD12121\u003cbr data-start=\"1837\" data-end=\"1840\"\u003eAFSAD12131\u003cbr data-start=\"1850\" data-end=\"1853\"\u003eAFSAD12141\u003c\/p\u003e\n\u003chr data-start=\"1867\" data-end=\"1870\"\u003e\n\u003ch2 data-start=\"1872\" data-end=\"1886\"\u003eAFSD Series\u003c\/h2\u003e\n\u003cp data-start=\"1888\" data-end=\"1935\"\u003eAFSD12111\u003cbr data-start=\"1897\" data-end=\"1900\"\u003eAFSD12121\u003cbr data-start=\"1909\" data-end=\"1912\"\u003eAFSD12131\u003cbr data-start=\"1921\" data-end=\"1924\"\u003eAFSD12141\u003c\/p\u003e\n\u003cp data-start=\"1937\" data-end=\"1984\"\u003eAFSD16111\u003cbr data-start=\"1946\" data-end=\"1949\"\u003eAFSD16121\u003cbr data-start=\"1958\" data-end=\"1961\"\u003eAFSD16131\u003cbr data-start=\"1970\" data-end=\"1973\"\u003eAFSD16141\u003c\/p\u003e\n\u003cp data-start=\"1986\" data-end=\"2021\"\u003eAFSD20121\u003cbr data-start=\"1995\" data-end=\"1998\"\u003eAFSD20131\u003cbr data-start=\"2007\" data-end=\"2010\"\u003eAFSD20141\u003c\/p\u003e\n\u003chr data-start=\"2023\" data-end=\"2026\"\u003e\n\u003cblockquote data-start=\"2028\" data-end=\"2115\"\u003e\n\u003cp data-start=\"2030\" data-end=\"2115\"\u003eIf your furnace serial number is AFTER 72498929, a different sail switch is required.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"2117\" data-end=\"2120\"\u003e\n\u003ch2 data-start=\"2122\" data-end=\"2137\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2141\" data-end=\"2205\"\u003eAftermarket replacement for early Atwood small series furnaces\u003c\/li\u003e\n\u003cli data-start=\"2208\" data-end=\"2264\"\u003eDesigned for units manufactured before serial 72498929\u003c\/li\u003e\n\u003cli data-start=\"2267\" data-end=\"2301\"\u003eVerifies airflow before ignition\u003c\/li\u003e\n\u003cli data-start=\"2304\" data-end=\"2352\"\u003eHelps resolve “blower runs but no heat” issues\u003c\/li\u003e\n\u003cli data-start=\"2355\" data-end=\"2392\"\u003eRestores proper ignition sequencing\u003c\/li\u003e\n\u003cli data-start=\"2395\" data-end=\"2436\"\u003eDirect-fit design for compatible models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2438\" data-end=\"2441\"\u003e\n\u003ch2 data-start=\"2443\" data-end=\"2485\"\u003eCommon Symptoms of a Failed Sail Switch\u003c\/h2\u003e\n\u003cp data-start=\"2487\" data-end=\"2530\"\u003eYou may need to replace the sail switch if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2534\" data-end=\"2580\"\u003eBlower motor runs but burner will not ignite\u003c\/li\u003e\n\u003cli data-start=\"2583\" data-end=\"2626\"\u003eFurnace attempts ignition then shuts down\u003c\/li\u003e\n\u003cli data-start=\"2629\" data-end=\"2659\"\u003eHeating works intermittently\u003c\/li\u003e\n\u003cli data-start=\"2662\" data-end=\"2701\"\u003eAirflow-related ignition faults occur\u003c\/li\u003e\n\u003cli data-start=\"2704\" data-end=\"2749\"\u003ePaddle arm is bent, sticking, or obstructed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2751\" data-end=\"2848\"\u003eThe sail switch is one of the most frequently replaced RV furnace parts in small AF series units.\u003c\/p\u003e\n\u003chr data-start=\"2850\" data-end=\"2853\"\u003e\n\u003ch2 data-start=\"2855\" data-end=\"2880\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2882\" data-end=\"3069\"\u003eManufacturer: M.C. Enterprises\u003cbr data-start=\"2912\" data-end=\"2915\"\u003ePart Number: 31093MC\u003cbr data-start=\"2935\" data-end=\"2938\"\u003eComponent: Low Air Flow Switch (Sail Switch)\u003cbr data-start=\"2982\" data-end=\"2985\"\u003eApplication: AF Small Series (Pre-Serial 72498929)\u003cbr data-start=\"3035\" data-end=\"3038\"\u003eType: Aftermarket Replacement\u003c\/p\u003e\n\u003chr data-start=\"3071\" data-end=\"3074\"\u003e\n\u003ch2 data-start=\"3076\" data-end=\"3111\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cp data-start=\"3113\" data-end=\"3263\"\u003e\u003cstrong data-start=\"3113\" data-end=\"3154\"\u003eQ: Why does the serial number matter?\u003c\/strong\u003e\u003cbr data-start=\"3154\" data-end=\"3157\"\u003eA: Furnace airflow switch designs changed after serial number 72498929, requiring a different sail switch.\u003c\/p\u003e\n\u003cp data-start=\"3265\" data-end=\"3385\"\u003e\u003cstrong data-start=\"3265\" data-end=\"3330\"\u003eQ: Will this fit AFSD furnaces made after that serial number?\u003c\/strong\u003e\u003cbr data-start=\"3330\" data-end=\"3333\"\u003eA: No. Later models require a different part number.\u003c\/p\u003e\n\u003cp data-start=\"3387\" data-end=\"3481\"\u003e\u003cstrong data-start=\"3387\" data-end=\"3421\"\u003eQ: What does a sail switch do?\u003c\/strong\u003e\u003cbr data-start=\"3421\" data-end=\"3424\"\u003eA: It verifies adequate airflow before allowing ignition.\u003c\/p\u003e\n\u003cp data-start=\"3483\" data-end=\"3596\"\u003e\u003cstrong data-start=\"3483\" data-end=\"3518\"\u003eQ: Is this an OEM Dometic part?\u003c\/strong\u003e\u003cbr data-start=\"3518\" data-end=\"3521\"\u003eA: No. This is an aftermarket replacement manufactured by M.C. Enterprises.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857561862385,"sku":null,"price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/31093SailMC.jpg?v=1772393605"},{"product_id":"m-c-enterprises-35132mc-furnace-limit-switch-replacement-for-atwood-rv-furnaces-8500-ii-8940","title":"M.C. Enterprises 35132MC Furnace Limit Switch – Replacement for Atwood RV Furnaces - 8500 II, 8940","description":"\u003ch1 data-section-id=\"kqdr5i\" data-start=\"285\" data-end=\"369\"\u003eM.C. Enterprises 35132MC Furnace Limit Switch – Replacement for Atwood RV Furnaces\u003c\/h1\u003e\n\u003cp data-start=\"371\" data-end=\"669\"\u003eProtect your RV furnace from overheating with the \u003cstrong data-start=\"421\" data-end=\"470\"\u003eM.C. Enterprises 35132MC Furnace Limit Switch\u003c\/strong\u003e. This replacement safety switch is designed for use in \u003cstrong data-start=\"526\" data-end=\"586\"\u003eAtwood Hydro Flame 8500-II and 8900-I series RV furnaces\u003c\/strong\u003e, helping regulate furnace temperature and prevent damage caused by excessive heat.\u003c\/p\u003e\n\u003cp data-start=\"671\" data-end=\"934\"\u003eThe limit switch continuously monitors furnace temperature during operation. If the furnace overheats due to restricted airflow or component failure, the switch \u003cstrong data-start=\"832\" data-end=\"865\"\u003einterrupts the burner circuit\u003c\/strong\u003e, shutting down the furnace to prevent damage to internal components.\u003c\/p\u003e\n\u003cp data-start=\"936\" data-end=\"1161\"\u003eIf your furnace starts but shuts down shortly after ignition or cycles on and off frequently, a faulty \u003cstrong data-start=\"1039\" data-end=\"1055\"\u003elimit switch\u003c\/strong\u003e may be the cause. Replacing the \u003cstrong data-start=\"1088\" data-end=\"1112\"\u003e35132MC limit switch\u003c\/strong\u003e can restore safe and reliable furnace operation.\u003c\/p\u003e\n\u003chr data-start=\"1163\" data-end=\"1166\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"1168\" data-end=\"1183\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1187\" data-end=\"1240\"\u003e\u003cstrong data-start=\"1187\" data-end=\"1240\"\u003eM.C. Enterprises replacement furnace limit switch\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1290\"\u003eDesigned for \u003cstrong data-start=\"1256\" data-end=\"1290\"\u003eAtwood Hydro Flame RV furnaces\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1293\" data-end=\"1326\"\u003eProtects furnace from overheating\u003c\/li\u003e\n\u003cli data-start=\"1329\" data-end=\"1374\"\u003eHelps restore proper furnace safety operation\u003c\/li\u003e\n\u003cli data-start=\"1377\" data-end=\"1439\"\u003eDurable construction for high-temperature furnace environments\u003c\/li\u003e\n\u003cli data-start=\"1442\" data-end=\"1502\"\u003eDirect replacement for worn or failed furnace limit switches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1504\" data-end=\"1507\"\u003e\n\u003ch2 data-section-id=\"18dvupj\" data-start=\"1509\" data-end=\"1537\"\u003eCompatible Furnace Models\u003c\/h2\u003e\n\u003cp data-start=\"1539\" data-end=\"1641\"\u003eThe \u003cstrong data-start=\"1543\" data-end=\"1592\"\u003eM.C. Enterprises 35132MC Furnace Limit Switch\u003c\/strong\u003e is compatible with the following furnace models.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1au5zst\" data-start=\"1643\" data-end=\"1661\"\u003e8500-II Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1664\" data-end=\"1673\"\u003e8516-II\u003c\/li\u003e\n\u003cli data-start=\"1676\" data-end=\"1685\"\u003e8520-II\u003c\/li\u003e\n\u003cli data-start=\"1688\" data-end=\"1697\"\u003e8525-II\u003c\/li\u003e\n\u003cli data-start=\"1700\" data-end=\"1709\"\u003e8531-II\u003c\/li\u003e\n\u003cli data-start=\"1712\" data-end=\"1721\"\u003e8535-II\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1r789x4\" data-start=\"1723\" data-end=\"1740\"\u003e8900-I Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1771\" data-end=\"1782\"\u003e8940-DC-I\u003c\/li\u003e\n\u003cli data-start=\"1785\" data-end=\"1796\"\u003e8940-AC-I\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1798\" data-end=\"1854\"\u003eAlways verify your furnace model number before ordering.\u003c\/p\u003e\n\u003chr data-start=\"1856\" data-end=\"1859\"\u003e\n\u003ch2 data-section-id=\"zte05f\" data-start=\"1861\" data-end=\"1883\"\u003eWhat This Part Does\u003c\/h2\u003e\n\u003cp data-start=\"1885\" data-end=\"1988\"\u003eThe \u003cstrong data-start=\"1889\" data-end=\"1913\"\u003efurnace limit switch\u003c\/strong\u003e is a critical safety component that protects the furnace from overheating.\u003c\/p\u003e\n\u003cp data-start=\"1990\" data-end=\"2033\"\u003eDuring furnace operation, the limit switch:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2038\" data-end=\"2077\"\u003eMonitors internal furnace temperature\u003c\/li\u003e\n\u003cli data-start=\"2081\" data-end=\"2109\"\u003eDetects unsafe heat levels\u003c\/li\u003e\n\u003cli data-start=\"2113\" data-end=\"2158\"\u003eShuts down the burner if overheating occurs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2160\" data-end=\"2241\"\u003eThis prevents damage to the furnace heat exchanger and other internal components.\u003c\/p\u003e\n\u003chr data-start=\"2243\" data-end=\"2246\"\u003e\n\u003ch2 data-section-id=\"1l2aube\" data-start=\"2248\" data-end=\"2303\"\u003eSigns Your Furnace Limit Switch May Need Replacement\u003c\/h2\u003e\n\u003cp data-start=\"2305\" data-end=\"2373\"\u003eA faulty limit switch can cause several furnace problems, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2377\" data-end=\"2421\"\u003eRV furnace \u003cstrong data-start=\"2388\" data-end=\"2421\"\u003estarts then shuts off quickly\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2424\" data-end=\"2466\"\u003eFurnace \u003cstrong data-start=\"2432\" data-end=\"2466\"\u003eburner shuts down unexpectedly\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2469\" data-end=\"2493\"\u003eFurnace \u003cstrong data-start=\"2477\" data-end=\"2493\"\u003eshort cycles\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2496\" data-end=\"2526\"\u003eFurnace \u003cstrong data-start=\"2504\" data-end=\"2526\"\u003eoverheating issues\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2529\" data-end=\"2570\"\u003eFurnace blower runs but burner shuts down\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2572\" data-end=\"2665\"\u003eReplacing the limit switch can often resolve \u003cstrong data-start=\"2617\" data-end=\"2664\"\u003eRV furnace overheating or shutdown problems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"2667\" data-end=\"2670\"\u003e\n\u003ch2 data-section-id=\"1r8frcv\" data-start=\"2672\" data-end=\"2701\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp data-start=\"2703\" data-end=\"2845\"\u003e\u003cstrong data-start=\"2703\" data-end=\"2743\"\u003eWhat does a furnace limit switch do?\u003c\/strong\u003e\u003cbr data-start=\"2743\" data-end=\"2746\"\u003eA limit switch monitors furnace temperature and \u003cstrong data-start=\"2794\" data-end=\"2844\"\u003eshuts down the burner if the furnace overheats\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2847\" data-end=\"2986\"\u003e\u003cstrong data-start=\"2847\" data-end=\"2898\"\u003eWhat happens when a furnace limit switch fails?\u003c\/strong\u003e\u003cbr data-start=\"2898\" data-end=\"2901\"\u003eThe furnace may \u003cstrong data-start=\"2917\" data-end=\"2985\"\u003eshut down during operation, short cycle, or fail to run properly\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2988\" data-end=\"3214\"\u003e\u003cstrong data-start=\"2988\" data-end=\"3036\"\u003eWhich furnaces use the 35132MC limit switch?\u003c\/strong\u003e\u003cbr data-start=\"3036\" data-end=\"3039\"\u003eThis switch is used in select \u003cstrong data-start=\"3069\" data-end=\"3126\"\u003eAtwood Hydro Flame 8500-II and 8900-I series furnaces\u003c\/strong\u003e, including models 8516-II, 8520-II, 8525-II, 8531-II, 8535-II, 8935, and 8940 furnaces.\u003c\/p\u003e\n\u003chr data-start=\"3216\" data-end=\"3219\"\u003e\n\u003ch2 data-section-id=\"1n9sz8f\" data-start=\"3221\" data-end=\"3255\"\u003eWhy Buy From RVFurnaceGuys.com?\u003c\/h2\u003e\n\u003cp data-start=\"3257\" data-end=\"3510\"\u003eAt \u003cstrong data-start=\"3260\" data-end=\"3281\"\u003eRVFurnaceGuys.com\u003c\/strong\u003e, we specialize exclusively in \u003cstrong data-start=\"3312\" data-end=\"3354\"\u003eRV furnace parts and repair components\u003c\/strong\u003e. Our goal is to help RV owners and technicians diagnose heating problems quickly and find the correct replacement parts to get their furnace running again.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47879804125425,"sku":null,"price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/35132MC.jpg?v=1772902077"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/collections\/Switches.jpg?v=1771711296","url":"https:\/\/rvfurnaceguys.com\/collections\/switches-and-safety-sensors-dometic.oembed","provider":"RV Furnace Guys","version":"1.0","type":"link"}