Had an electric heater unit installed in Feb 15, Worked at the camp site on shore power. Got Home, it will work on generator power not house power? All other systems are ok, I left it in the off mode, and when I checked this Pm, still in off mode but light in switch is on.? I use a 30amp system at home, coach is 5o amp, campground was 50 amp. Someone mentioned the 30 amp plug at home might be wired wrong. Any suggestions?