Dometic Atwood Gas Control Valve | 92078 | 6 Gal DSI Water Heater

Restore safe, reliable propane delivery to your 6-gallon Atwood/Dometic RV water heater with the Dometic 92078 Gas Control Valve. This genuine Dometic OEM replacement gas valve controls propane flow to the burner on 6-gallon water heaters with Direct Spark Ignition (DSI) — the critical component that opens and closes propane flow based on signals from the control board. When the valve fails, the water heater either won't ignite at all or won't shut off properly.

For 6-Gallon Atwood / Dometic Water Heaters with DSI

The 92078 is engineered specifically for 6-gallon Atwood and Dometic water heaters with Direct Spark Ignition (DSI) — also called electronic ignition water heaters. This includes the G6A, GH6, GC6/GC6A/GC6AA, and GCH6/GCH6A series with electric ignition.

Verify your existing water heater model and ignition type on the manufacturer label before ordering. The 92078 is specifically for 6-gallon DSI models — it is NOT compatible with pilot ignition variants or 10-gallon water heaters.

Need the 10-Gallon Version Instead?

If your water heater is a 10-gallon Atwood/Dometic with DSI (rather than 6-gallon), the correct gas valve is the Dometic 92089 Gas Control Valve instead. The 6-gallon and 10-gallon gas valves are NOT interchangeable — verify your water heater capacity before ordering.

White Rogers Style Construction

The 92078 is built in the White Rogers style — a recognized industry-standard design that uses the same form factor and mounting layout as the original equipment valve. The familiar style means experienced RV service technicians can install it confidently without architecture-specific learning curves.

How the Gas Valve Works

The 92078 is the critical component that controls propane flow to the burner:

• Opens via signal from the water heater's control board when heat is demanded
• Allows propane flow to the burner where the DSI igniter lights it
• Closes when temperature setpoint is reached — shutting off propane supply
• Provides safety shutoff if the ignition sequence fails

Common Failure Symptoms

Common reasons to replace the gas valve include:

• Water heater won't ignite despite proper power, ignition spark, and propane supply
• Water heater fires but cycles erratically
• Valve doesn't close fully when commanded — gas continues flowing after shutdown
• Coil continuity testing shows failure in the valve solenoid
• Gas smell at the water heater indicating valve leakage
• Erratic flame quality

Before assuming the valve has failed, rule out simpler issues like low propane supply pressure, failed igniter, blocked burner, control board issues, or wiring problems — these can mimic valve symptoms.

Paired Components for 6-Gallon DSI Water Heater Service

The gas valve works hand-in-hand with several other water heater components. If you're servicing a 6-gallon DSI water heater, consider these related parts:

• Dometic/Atwood 91638 Main Burner (6-gallon DSI) — pairs naturally with the gas valve since the gas valve delivers propane to the burner
• Dometic 93105 Adjustable Thermostat Control — covers 6-gallon AND 10-gallon G/GC/GH series with electric ignition, lets you upgrade from fixed-setpoint to 110°F–150°F adjustable control
• For complete ignition system service: Dometic 91363 Ignition Control Kit (board + electrode for Atwood water heaters) — or the Channel Products 91363 Ignition Control Kit (same part, same MFG as Dometic OEM, cost-effective alternative)

Genuine Dometic OEM Replacement

As a Dometic factory replacement part, the 92078 is built to original specifications for a precise drop-in fit in compatible 6-gallon DSI water heater installations.

⚠️ Professional Installation Required

Gas valves should be installed and tested by a qualified RV service technician. Improperly installed propane components are a fire and explosion risk. Always pressure-test connections after installation and verify proper valve operation before returning the water heater to service.

Key Features

• Genuine Dometic OEM gas control valve
• For 6-gallon Atwood/Dometic water heaters with Direct Spark Ignition (DSI)
• White Rogers style form factor
• Compatible with all electronic ignition 6-gallon Atwood water heaters
• NOT compatible with pilot ignition models
• NOT compatible with 10-gallon water heaters (use 92089 instead)
• Direct OEM replacement

Specifications

• Brand: Dometic (Atwood)
• Part Number: 92078
• Type: RV Water Heater Gas Control Valve
• Application: 6-gallon Atwood/Dometic water heaters with Direct Spark Ignition (DSI)
• Valve Style: White Rogers
• NOT Compatible With: Pilot ignition water heaters; 10-gallon water heaters (use 92089 instead)
• Sibling Part (10-Gallon): Dometic 92089