attwood gc10-e3 water heater

Thanks for posting update....


Hot water GOOD especially when it is a simple no harm/no foul no money fix :B

Love you guys, as was suggested the bypass valve was open, never even thought to check that and as I said, I had had drained the water system this past spring doing some work on the rig, feel kind of like duhhh, I should have checked that?
Hot showers again!

Thanks to all who have replied, I have to check the valves then as I did have them shut off this past spring while doing some remodeling in the rig. I will post what I find.

Your Atwood GC10A-3E is indeed a electic & gas water heater

BUT the electric uses it's own separate 120V AC set of t-stat/ECO. They are located on backside of water heater tank with the electric element

The gas uses it's own separate 12V DC set of t-stat/ECO and they are located on front in the outside compartment

Both sets are fixed temp
T-stat OPENS at 140*F (closes for refire at 110*F)
ECO (Energy Cut Off--High temp) OPENS at 180*F

Warm water on electric AND propane..then either water heater bypass valve is open/leaking thru (as suggested)
OR you have a shower still on (Hot/Cold Knobs open) and turned off at handle (allows hot/cold to mix inside the shower faucet which then results in warm water in hot lines)


FYI....Mixer Valves used on 'EXT' models (GE9-EXT or GE16-EXT)

Check the rear of the water heater. It may have a mixer valve that regulates the water temp. Same thing happened to us a few years ago. I turned the adjustment knob back and forth a few times and that fixed the problem.

I hate to ask, but are you sure the bypass valve(s) are in the right position?