Troubleshooting Atwood GC10A-4E Water Heater

Updated 05/15/2025 | Published 08/23/2021

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Double-Panel On/Off Switch for Dometic Gas / Electric Combination Water Heaters - White

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Question:

I have a Atwood GC10A-4E water heater I go and turn the switch for the Lp side of the water heater the light on the switch and the light on the out of gas just blink on and then off I turn the switch on for Electric side of the water heater and it stays on and heats up the water in the unit Any ideas what i need to look at Thanks for your help

asked by: Pete F

Expert Reply:

It sounds like you have a lack of LP flow, check to see if the pilot light itself is lit; it should be. If your propane supply is good, full bottles and a functioning regulator, verify this by operation check of another LP appliance such as the stove. If the stove functions properly then your LP system is proper at least up to the point of the water heater. If your pilot light will not stay lit ensure there are no obstructions/blockage.

You may have a bad thermostat/regulator in need of replacement, this would be, # 91602. Observe how many times the lights blink/flash, these signals are providing a fault indication and can help with troubleshooting.

If you determine that you need to replace your Atwood RV Water Heater, Model # GC10A-4E, the direct replacement is the Atwood RV Water Heater - Gas and Electric - part # AT94022 along with its On/Off switch - part # AT91230. This is the new version of your existing water heater, so it will have all the same features like a 10-gallon capacity, automatic pilot with electronic ignition and 10,000 BTU.

expert reply by: Michael R

Paul

4/28/2025

I have the WH 6GEA and the example is somewhat the same. The electric works but the gas side fires for 5 seconds and shuts off. 3 times is the cycle and then locks out, Red light comes on the switch panel. I have changed the control board, flame ignitor/sensor, and Thermal fuse. Gas pressure seems good as stove lights up fine. Is there any function in the dual switch that can cause this not to stay lit? I purchased the dual switch last year from E-trailer and it worked fine all last year. The water heater was also installed new last year too.

Jon G.

5/9/2025

@Paul I had to reach out to my contact at Dometic for this one because it is a bit of a head-scratcher. They ultimately said you'll need to have a service tech take a look at it, but also said it could possibly be one of the following: "Not lighting on gas would be an issue with LP pressure, the gas valve alignment; power from board not opening up the gas valve, the electrode placement/or electrode not sensing the flame." Unless you're really familiar with working on water heaters, I'd get a tech out there to help you out.

Jon G.

5/15/2025

@Paul Thanks for the update - I'm glad you were able to get it back up and running!