We discovered this weekend that my Atwood model GC6AA-10E water heater was acting weird.
While on AC power it runs on AC only perfectly.
With no AC power to the TT it runs perfectly on Gas only.
With AC power to the TT it WILL NOT run on GAS only..
When connected to AC I turned the WH gas switch on and heard the familiar light off and gas burning, but our EMS indicated an amp draw equal to when running the WH on electric.
After a few minutes I noticed the gas fault indicator light was lit. So I shut off the gas switch and turned it back on.
Same sequence of events only the second time my relief valve popped!
I suspect I have a stuck relay somewhere.....
Anyone have any ideas?