Originally Posted by Nomore9-5
Sorry meant to say only interior switch is for 12vdc control circuit for propane side of water heater Electric heating is switched on and off with outside switch at water heater ( the one you indicated)
Then the only things I can suggest it turn off the circuit breaker in the bedroom panel then turn back on.
Are you sure you have 120 volts to the motorhome?
Does your microwave work?
If you still don't know it is time to get some help by someone who knows about electricity.