Dometic / Atwood RV Furnace Gas Valve – Part #31098

Replace your old or failing propane gas valve with this OEM-style Dometic/Atwood furnace gas valve, Part #31098. This precision-engineered gas valve is designed to safely control the flow of LP gas to the burner in compatible Dometic and Atwood RV furnaces. Built to meet factory specifications, it helps restore reliable ignition, steady flame performance, and consistent heat output.

If your furnace struggles to ignite, shuts off unexpectedly, or produces inconsistent heat, a faulty gas valve may be the cause. Replacing it with the correct OEM replacement can restore dependable operation and safe LP gas delivery.

Key Features:

• OEM Replacement Gas Valve – Part #31098
• Designed for Dometic / Atwood LP gas RV furnaces
• Controls propane flow to burner assembly
• Durable construction for long service life
• Direct-fit design for compatible models

Common Symptoms of a Failing Gas Valve:

• Furnace will not ignite
• Burner lights briefly then shuts off
• Weak or uneven flame
• Furnace goes into lockout mode
• Thermostat calling for heat but no burner activity

Replacing a worn or malfunctioning gas valve can resolve many common ignition and fuel delivery issues.

Compatibility – Works With These Models:

AFSAD / AFSD Series:
AFSAD12111
AFSD12111
AFSAD12121
AFSD12121
AFSAD12131
AFSD12131
AFSAD12141
AFSD12141
AFSD16111
AFSD16121
AFSD16131
AFSD16141
AFSD20111
AFSD20121
AFSD20131
AFSD20141

AFMD Series:
AFMD16111
AFMD16121
AFMD16131
AFMD16141
AFMD16151
AFMD20111
AFMD20121
AFMD20131
AFMD20141
AFMD20151
AFMD25111
AFMD25121
AFMD25131
AFMD25141
AFMD25151
AFMD30111
AFMD30121
AFMD30131
AFMD30141
AFMD30151
AFMD35111
AFMD35121
AFMD35131
AFMD35141
AFMD35151

DFMD / DFLD / DFMDH / DFSDH Series:
DFMD16111
DFMD16121
DFMDH25111
DFMDH25121
DFMDH30111
DFMDH30121
DFMDH35111
DFMDH35121
DFLD40111
DFLD40121
DFSDH20111
DFSDH20121

Always verify your exact furnace model before ordering to ensure compatibility.

What’s Included:

• (1) LP Gas Valve – Part #31098

Installation Notes:

Turn off propane supply and disconnect 12V power before servicing your furnace. Professional installation is recommended to ensure safe and proper setup.

Frequently Asked Questions:

1.  What does the Dometic / Atwood Gas Valve #31098 do?
The gas valve regulates the flow of LP propane gas from your RV’s supply line to the furnace burner. It opens during ignition and closes when the heating cycle ends, ensuring safe and controlled combustion.

2. How do I know if my gas valve needs to be replaced?
Common signs of a failing gas valve include:

• Furnace will not ignite
• Burner lights briefly then shuts off
• Intermittent or weak flame
• Furnace goes into ignition lockout
• Blower runs but no heat is produced

If other components (like the sail switch or ignition board) test good, the gas valve may be the issue.

3. Is Part #31098 a direct replacement?
Yes. This is an OEM-style replacement designed to directly replace the original gas valve used on compatible Dometic and Atwood furnace models listed above.

4. Does this valve work with both single-stage and multi-stage furnaces?
This valve is designed for compatible single-stage Dometic/Atwood furnaces. Always verify your specific model to confirm compatibility.

5. Can I install this gas valve myself?
Installation requires disconnecting propane and 12V power and working with gas fittings. While experienced RV owners can perform the repair, professional installation is recommended to ensure safe propane system operation.

6. Do I need any additional parts for installation?
In most cases, the valve is a direct replacement. However, inspect existing fittings and gas lines for wear and replace seals or fittings if needed during installation.

7. Will this fix ignition problems?
If the problem is related to improper gas flow, sticking valves, or weak flame, replacing the gas valve often resolves ignition issues. However, ignition boards, sail switches, and electrodes can also cause similar symptoms.

8. How can I confirm this fits my furnace?
Check your furnace model number on the data plate inside the exterior access panel. Compare it with the compatibility list above before ordering. If unsure, reference your furnace manual or parts breakdown.