WH-6GA complete gas-only water heaterDometic WH-6GA Gas Water Heater Parts & Exploded Diagram
The Dometic WH-6GA is a six-gallon propane-only RV water heater with electronic ignition. Dometic's numbered service drawing and kit list identify repair components for its burner, gas control, ignition circuit, tank and exterior door. Use the WH-6GA model label and the part numbers below to choose the correct replacement.
View Available Parts With Photos
Gas-only is important: the WH-6GA does not have the WH-6GEA's 120 V electric heating element. It uses the 91367 gas ignition board and 92098 tank kit, rather than the 91365 gas/electric board and 92099 electric-equipped tank. Those assemblies should not be interchanged based on the similar model names.
WH-6GA factory exploded parts diagram
Dometic's service-kit diagram illustrates replacement components by kit number. The following page of the same document has a model-by-model table; check the 6A column for WH-6GA parts.
Open original service-kit drawing (PDF)
View the Dometic exploded drawing here
For better zoom on a phone, open the original PDF above.
Manufacturer service-kit numbers for WH-6GA
| Dometic kit | Component | Location |
|---|---|---|
| 91367 | Gas-only ignition control board | 12 V controls |
| 91859 / 91959 | White / black single gas switch | Inside RV |
| 92098 | Six-gallon tank kit for WH-6GA | Tank; distinct from 92099 |
| 92100 | Six-gallon gas system assembly | Gas valve and system |
| 92104 | Igniter service kit | Ignition electrode |
| 90028 | 3/4-inch, 150 PSI pressure/temperature relief valve | Tank safety fitting |
| 92102 | Drain cap kit, pack of two | Drain opening |
| 90145 | 2 A fuse service kit | Control circuit |
| 92101 | Access-door hardware | Outside door |
| 91447 | DSI thermostat and ECO kit | Temperature and safety controls |
| 92103 | Flue box assembly | Exhaust assembly |
| 92105 | Six-gallon insulation kit | Tank insulation |
| 92108 | Gas-only wiring service kit | Electrical connections |
| 94871 | Corner-bracket service kit | Mounting brackets |
| 94900 / 94905 | Black / Arctic white six-gallon access-door kits | Exterior door |
Identify parts on the heater
The manufacturer's installation manual has a separate numbered component-location drawing. These position numbers are not the same as the service-kit numbers above. The drawing is shared with the electric-equipped models, so its electric element cover (position 12) is not a WH-6GA heating function.
See Dometic's illustrated component locations (PDF)
| Position | Component |
|---|---|
| 1 | Access door |
| 2 | Tank |
| 3 | Flue assembly |
| 4 | Hot water outlet |
| 5 | Cold water inlet |
| 6 | Gas valve |
| 7 | Ignition electrode |
| 8 | Thermostat / ECO |
| 9 | Thermal cut-off |
| 10 | Pressure/temperature relief valve |
| 11 | DSI control board |
Common WH-6GA replacement decisions
Electronic ignition problem
The factory lists 91367 as the gas-only board and 92104 as the igniter. A failed ignition cycle does not by itself prove either component is faulty.
Tank drainage
The 92102 drain caps are separate from the tank kit. The WH-6GA replacement tank is factory-listed as 92098, not 92099.
Safety valve leakage
Dometic lists 90028 as the 3/4-inch, 150 PSI pressure/temperature relief valve. Do not obstruct, alter or bypass it.
Complete heater and exterior access doors
The complete gas-only heater and compatible exterior doors are listed separately. Check the opening, mounting arrangement and finish before ordering a door.
WH-6GA complete gas-only water heater
Black WH-series access door
Arctic white WH-series access doorGas appliance servicing
This heater has a propane burner and 12 V ignition system. Shut off the propane and electrical supply before inspection; avoid opening a hot or pressurized water connection. Work on gas and safety controls should be completed by a qualified service technician. Follow Dometic's installation, leak-testing and maintenance instructions.
For a heater with both propane and electric operation, see the Dometic WH-6GEA parts guide. The electric-equipped model has different tank and ignition-control kits.
WH-6GA parts with photographs
Select a part to see its listing on UsedRVParts.ca. Factory kit numbers are shown with each photograph.
Gas-only ignition circuit board91367The ignition board identified for the gas-only WH-6GA, distinct from the gas/electric board.
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White single control switch9185912 V control switch for the gas-only ignition system; the factory matrix also lists black kit 91959.
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Six-gallon gas system assembly92100Complete factory-listed gas-system service kit for the six-gallon model family.
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Igniter service kit92104Ignition electrode service component for the burner assembly.
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Drain cap kit92102Two drain caps for the water heater tank; allow water to cool before removing a cap.
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150 PSI pressure/temperature relief valve900283/4-inch factory safety valve, which must not be blocked or substituted with a nonrated fitting.
View partMore photographed parts: door hardware and control fuse
Exterior door hardware92101Door-hinge and fastening kit for the heater's access opening.
View part
2 A fuse service kit90145Factory-listed fuse service kit for the WH-6GA electronics.
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