{"product_id":"suburban-520840-wiring-harness-nt-s-nt-se-furnaces-for-use-with-521099-board-special-order","title":"Suburban 520840 Wiring Harness – NT-S \u0026 NT-SE Furnaces (For Use with 521099 Board) – Special Order","description":"\u003ch2 data-section-id=\"53drpp\" data-start=\"258\" data-end=\"279\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"280\" data-end=\"503\"\u003eThe \u003cstrong data-start=\"284\" data-end=\"318\"\u003eSuburban 520840 Wiring Harness\u003c\/strong\u003e is designed specifically for \u003cstrong data-start=\"348\" data-end=\"394\"\u003eSuburban NT-S and NT-SE series RV furnaces\u003c\/strong\u003e, allowing proper integration with the \u003cstrong data-start=\"433\" data-end=\"466\"\u003e521099 ignition control board\u003c\/strong\u003e to enable fan control functionality.\u003c\/p\u003e\n\u003cp data-start=\"505\" data-end=\"734\"\u003eThis harness is required when upgrading furnaces that did not originally include fan control wiring. It ensures proper communication between furnace components and allows the 521099 board to operate the blower system efficiently.\u003c\/p\u003e\n\u003cp data-start=\"736\" data-end=\"890\"\u003eIdeal for restoring or upgrading your furnace system, the 520840 harness helps maintain reliable operation and prevents wiring issues during installation.\u003c\/p\u003e\n\u003chr data-start=\"892\" data-end=\"895\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"897\" data-end=\"914\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"915\" data-end=\"1388\"\u003e\n\u003cli data-section-id=\"14m0bxc\" data-start=\"915\" data-end=\"975\"\u003eDesigned for Suburban \u003cstrong data-start=\"939\" data-end=\"973\"\u003eNT-S and NT-SE series furnaces\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"11gso5x\" data-start=\"976\" data-end=\"1053\"\u003eEnables \u003cstrong data-start=\"986\" data-end=\"1015\"\u003efan control functionality\u003c\/strong\u003e when used with control board 521099\u003c\/li\u003e\n\u003cli data-section-id=\"o4ffwb\" data-start=\"1054\" data-end=\"1108\"\u003eRequired for upgrading systems without fan control\u003c\/li\u003e\n\u003cli data-section-id=\"1c4ihr9\" data-start=\"1109\" data-end=\"1160\"\u003eProvides secure and reliable wiring connections\u003c\/li\u003e\n\u003cli data-section-id=\"1reavob\" data-start=\"1161\" data-end=\"1217\"\u003eHelps ensure proper furnace operation and efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"83yh3w\" data-start=\"1218\" data-end=\"1275\"\u003eReduces risk of electrical issues and improper wiring\u003c\/li\u003e\n\u003cli data-section-id=\"qykgd7\" data-start=\"1276\" data-end=\"1330\"\u003eDirect-fit design for straightforward installation\u003c\/li\u003e\n\u003cli data-section-id=\"fr00bb\" data-start=\"1331\" data-end=\"1388\"\u003eSpecial Order Item – Estimated \u003cstrong data-start=\"1364\" data-end=\"1386\"\u003e7–14 day lead time\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1390\" data-end=\"1393\"\u003e\n\u003ch2 data-section-id=\"1qhk4i3\" data-start=\"1395\" data-end=\"1414\"\u003eSpecifications\u003c\/h2\u003e\n\u003cul data-start=\"1415\" data-end=\"1607\"\u003e\n\u003cli data-section-id=\"1c02fyl\" data-start=\"1415\" data-end=\"1438\"\u003ePart Number: 520840\u003c\/li\u003e\n\u003cli data-section-id=\"1snwcer\" data-start=\"1439\" data-end=\"1483\"\u003eProduct Type: Fan control wiring harness\u003c\/li\u003e\n\u003cli data-section-id=\"n4z1v0\" data-start=\"1484\" data-end=\"1543\"\u003eApplication: Suburban NT-S and NT-SE series RV furnaces\u003c\/li\u003e\n\u003cli data-section-id=\"jvktfw\" data-start=\"1544\" data-end=\"1607\"\u003eFunction: Enables fan control integration with 521099 board\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1609\" data-end=\"1612\"\u003e\n\u003ch2 data-section-id=\"yzynuf\" data-start=\"1614\" data-end=\"1644\"\u003eCompatible Furnace Models\u003c\/h2\u003e\n\u003ch3 data-section-id=\"13bnjvb\" data-start=\"1646\" data-end=\"1672\"\u003eSuburban NT-S Series\u003c\/h3\u003e\n\u003cul data-start=\"1673\" data-end=\"1705\"\u003e\n\u003cli data-section-id=\"e1b59r\" data-start=\"1673\" data-end=\"1683\"\u003eNT-12S\u003c\/li\u003e\n\u003cli data-section-id=\"e182cr\" data-start=\"1684\" data-end=\"1694\"\u003eNT-16S\u003c\/li\u003e\n\u003cli data-section-id=\"dz6w4u\" data-start=\"1695\" data-end=\"1705\"\u003eNT-20S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1is4ir6\" data-start=\"1707\" data-end=\"1734\"\u003eSuburban NT-SE Series\u003c\/h3\u003e\n\u003cul data-start=\"1735\" data-end=\"1770\"\u003e\n\u003cli data-section-id=\"110h56y\" data-start=\"1735\" data-end=\"1746\"\u003eNT-12SE\u003c\/li\u003e\n\u003cli data-section-id=\"10xnnny\" data-start=\"1747\" data-end=\"1758\"\u003eNT-16SE\u003c\/li\u003e\n\u003cli data-section-id=\"z2mb6z\" data-start=\"1759\" data-end=\"1770\"\u003eNT-20SE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1772\" data-end=\"1775\"\u003e\n\u003ch2 data-section-id=\"1rkovwv\" data-start=\"1777\" data-end=\"1809\"\u003eImportant Installation Note\u003c\/h2\u003e\n\u003cp data-start=\"1810\" data-end=\"1929\"\u003eThis wiring harness connects to the \u003cstrong data-start=\"1846\" data-end=\"1888\"\u003eSuburban 521099 ignition control board\u003c\/strong\u003e to activate the \u003cstrong data-start=\"1905\" data-end=\"1928\"\u003efan control feature\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul data-start=\"1931\" data-end=\"2092\"\u003e\n\u003cli data-section-id=\"os4ucs\" data-start=\"1931\" data-end=\"2011\"\u003eThe \u003cstrong data-start=\"1937\" data-end=\"1976\"\u003e521099 module board is NOT included\u003c\/strong\u003e and must be purchased separately\u003c\/li\u003e\n\u003cli data-section-id=\"l7q66q\" data-start=\"2012\" data-end=\"2092\"\u003eRequired when upgrading furnaces that do not already have fan control wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2094\" data-end=\"2097\"\u003e\n\u003ch2 data-section-id=\"tr8gm2\" data-start=\"2099\" data-end=\"2134\"\u003eWhen Do You Need This Harness?\u003c\/h2\u003e\n\u003cp data-start=\"2135\" data-end=\"2180\"\u003eYou will need the 520840 wiring harness if:\u003c\/p\u003e\n\u003cul data-start=\"2181\" data-end=\"2420\"\u003e\n\u003cli data-section-id=\"r5h0cx\" data-start=\"2181\" data-end=\"2234\"\u003eYou are upgrading to the \u003cstrong data-start=\"2208\" data-end=\"2232\"\u003e521099 control board\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"13uervd\" data-start=\"2235\" data-end=\"2302\"\u003eYour NT-S or NT-SE furnace does \u003cstrong data-start=\"2269\" data-end=\"2300\"\u003enot have fan control wiring\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"18cvz0u\" data-start=\"2303\" data-end=\"2350\"\u003eYou are replacing damaged or missing wiring\u003c\/li\u003e\n\u003cli data-section-id=\"1yx5ia\" data-start=\"2351\" data-end=\"2420\"\u003eYour furnace fan does not function properly after a board upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2422\" data-end=\"2425\"\u003e\n\u003ch2 data-section-id=\"1hdrzr1\" data-start=\"2427\" data-end=\"2456\"\u003eWhy This Harness Matters\u003c\/h2\u003e\n\u003cul data-start=\"2457\" data-end=\"2674\"\u003e\n\u003cli data-section-id=\"1ezxal1\" data-start=\"2457\" data-end=\"2516\"\u003eEnsures proper communication between furnace components\u003c\/li\u003e\n\u003cli data-section-id=\"vzrk9\" data-start=\"2517\" data-end=\"2573\"\u003eAllows full functionality of upgraded control boards\u003c\/li\u003e\n\u003cli data-section-id=\"dopbau\" data-start=\"2574\" data-end=\"2628\"\u003ePrevents wiring mismatches and installation issues\u003c\/li\u003e\n\u003cli data-section-id=\"16xoo1l\" data-start=\"2629\" data-end=\"2674\"\u003eHelps extend furnace life and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2676\" data-end=\"2679\"\u003e\n\u003ch2 data-section-id=\"x9bttf\" data-start=\"2681\" data-end=\"2689\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"2691\" data-end=\"2831\"\u003e\u003cstrong data-start=\"2691\" data-end=\"2740\"\u003eDo I need this with the 521099 control board?\u003c\/strong\u003e\u003cbr data-start=\"2740\" data-end=\"2743\"\u003eYes, if your furnace does not already have fan control wiring, this harness is required.\u003c\/p\u003e\n\u003cp data-start=\"2833\" data-end=\"2921\"\u003e\u003cstrong data-start=\"2833\" data-end=\"2867\"\u003eIs the control board included?\u003c\/strong\u003e\u003cbr data-start=\"2867\" data-end=\"2870\"\u003eNo, the \u003cstrong data-start=\"2878\" data-end=\"2920\"\u003e521099 module board is sold separately\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2923\" data-end=\"3050\"\u003e\u003cstrong data-start=\"2923\" data-end=\"2964\"\u003eWill this fit all NT series furnaces?\u003c\/strong\u003e\u003cbr data-start=\"2964\" data-end=\"2967\"\u003eNo, this harness is specifically for \u003cstrong data-start=\"3004\" data-end=\"3049\"\u003eNT-S and NT-SE series models listed above\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3052\" data-end=\"3155\"\u003e\u003cstrong data-start=\"3052\" data-end=\"3078\"\u003eIs this item in stock?\u003c\/strong\u003e\u003cbr data-start=\"3078\" data-end=\"3081\"\u003eThis is a \u003cstrong data-start=\"3091\" data-end=\"3113\"\u003especial order item\u003c\/strong\u003e with an estimated \u003cstrong data-start=\"3132\" data-end=\"3154\"\u003e7–14 day lead time\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3157\" data-end=\"3265\"\u003e\u003cstrong data-start=\"3157\" data-end=\"3187\"\u003eIs installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"3187\" data-end=\"3190\"\u003eNo, this is a direct-fit harness designed for straightforward installation.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47949573292273,"sku":null,"price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/520839_d6ed0ac1-6bca-4114-b62b-9c17e3d01b61.jpg?v=1774300762","url":"https:\/\/rvfurnaceguys.com\/products\/suburban-520840-wiring-harness-nt-s-nt-se-furnaces-for-use-with-521099-board-special-order","provider":"RV Furnace Guys","version":"1.0","type":"link"}