Water Heater Problem

I have a 2015 Arctic Fox 5th wheel with an Atwood water heater. Just recently it stopped working on electric, but worked fine on propane, I replaced the heating element, both thermostats, the on/off switch in the exterior water heater compartment, and verified the 110v breaker is functioning. Still does not work on electric, but fine on propane. Anyone have this problem?  Any suggestions?