Thank you, Ken! I went out to the motorhome and looked at the breaker panel. Nothing is designated hot water heater. There is a vertical panel with 2 rows of 4 breakers. On the left going down are: 50 amp main (2 breakers), rear air, front air. On the right side is: Refer, passenger recpt, inverter-converter and radiant heat/wash/dry. Then on the right side of that compartment is thing that looks like a double light switch. The top read across: AC front and AC back. On the bottom it reads: heater 1 and heater 2. There is also a panel in between the breaker and the light switch thing, but I didn't take the screws out of the cover to look inside. Could it be in there? Thanks again for your help!