Atwood water heater heating to tepid then shuts off

Definitely not the shower handle issue; done that before. :) By-pass valves are good; been down that road before, too.

I did more research about the thermal cut-off and agree that's likely not the issue.

So that leaves the T-stats. You gave me some good info on how to find them (getting to them is going to be interesting).

Thank you so, so, so much!

Rae