Complete Dometic WH-9GEA XT water heaterWH-9GEA XTSix-gallon physical tank, nine-gallon effective hot-water capacity.
View partDometic WH-9GEA XT Water Heater Parts & Diagram
The Dometic WH-9GEA XT is a propane-and-electric RV water heater with a six-gallon tank and nine-gallon effective hot-water capacity. Its XT mixing system blends hotter tank water with cold water to extend the amount of usable hot water at the outlet. The factory service-kit drawing and model-specific matrix below help identify the correct valve, thermostat, tank, ignition and electrical parts.
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The WH-9GEA XT is not a nine-gallon physical tank. It also does not use every temperature-control component found in the standard WH-6GEA. Check the model label and match the original kit number before ordering.
Original Dometic WH-9GEA service-kit diagram
The original Dometic service drawing shows the replacement kits, while the model matrix identifies which kits apply to 9GEA. Unlike the standard six-gallon gas/electric model, this XT unit uses service numbers 90029 for its mixing valve and 91547 for its temperature-control kit.
Open full-size Dometic exploded parts drawing (PDF)
View the factory drawing and numbered kit labels
For easier viewing on a phone, open the PDF directly, then inspect the following page's 9GEA column.
Dometic WH-9GEA XT service-kit numbers
These are manufacturer-listed kit numbers. Where UsedRVParts carries the exact kit, the number links directly to its product listing.
| Dometic kit number | Component |
|---|---|
| 90028 | P/T relief valve, 3/4 inch, 150 PSI |
| 90029 | XT mixing valve |
| 90145 | 2 A fuse kit |
| 91230 | White gas/electric dual switch |
| 91365 | Gas/electric ignition board |
| 91547 | XT thermostat and ECO kit |
| 92097 | Electric heating element |
| 92099 | Six-gallon gas/electric tank |
| 92100 | Six-gallon gas system |
| 92101 | Exterior door mounting hardware |
| 92102 | Drain cap kit |
| 92104 | Igniter kit |
| 93849 | Electric-system relay |
| 94398 | Thermal cut-off kit |
| 92105 | Six-gallon insulation kit |
| 92110 | XT electrical wiring kit |
| 94900 / 94905 | Six-gallon exterior doors — black / Arctic white |
Why the WH-9GEA differs from the WH-6GEA
Hot-water mixing
The 90029 XT mixing valve produces the higher effective hot-water capacity. Its function is different from a conventional tank's outlet fitting.
Temperature protection
The WH-9GEA XT uses the 91547 thermostat/ECO kit. The standard WH-6GEA uses a different thermostat/ECO kit.
Tank and electric heat
The manufacturer lists the 92099 six-gallon gas/electric tank and 92097 element for both models.
Complete heater and exterior access doors
A complete WH-9GEA XT replacement and matching exterior door options are listed separately. The heater itself is sold without the exterior access door, so compare the existing opening and finish before selecting one.
Complete Dometic WH-9GEA XT water heaterWH-9GEA XT
Black WH-series exterior access doorAccess doorBlack steel exterior door listed for the WH-9GEA family.
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Arctic white WH-series exterior access doorAccess doorArctic white exterior access door listed for the WH-9GEA family.
View partInstallation and service precautions
This heater uses propane, pressurized hot water, 12 V controls and an electric heating circuit. Shut off the electrical and gas supplies and let the water cool before servicing. Never cap the pressure/temperature relief valve, defeat a high-limit device or run the electric element with an empty tank. Gas-system and electrical repairs should be performed by a qualified technician.
View Dometic's installation and component-location manual (PDF). If your heater is the standard gas/electric six-gallon model, see the WH-6GEA parts guide; for the gas-only version, use the WH-6GA guide.
WH-9GEA XT parts with photos
Each pictured component links to its corresponding listing on UsedRVParts.ca. Select the part number shown on your existing component or in the original Dometic drawing.
XT thermostatic mixing valve90029Mixes heated tank water with cooler water to produce the XT model's higher effective hot-water capacity.
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XT thermostat and ECO kit91547The factory-listed XT temperature-control and high-limit protection kit.
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Gas/electric ignition control board9136512 V ignition electronics for the gas/electric configuration; check the existing connector before replacement.
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Six-gallon tank kit92099The six-gallon gas/electric tank service number used in the WH-9GEA XT.
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Electric heating element92097Service element for the electric heating circuit.
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Six-gallon gas-system assembly92100Manufacturer-listed gas-system service assembly for the six-gallon heater family.
View partMore pictured replacement parts: drains, ignition, safety valve, relay, switch and door hardware
Drain cap kit92102Replacement drain caps for tank drainage and winterization.
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Igniter service kit92104Electrode/ignition service component on the burner system.
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Pressure/temperature relief valve90028Factory-listed 3/4-inch 150 PSI safety valve for the tank.
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Electric-system relay93849Relay service kit for the electric-heating circuit.
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Exterior door hardware92101Retaining and hinge hardware for the exterior heater access door.
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White dual-fuel control switch91230Inside-RV switch assembly for independently selecting gas and electric operation.
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2-amp fuse kit90145Factory-listed 2 A fuse for the heater's control circuit.
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