No, we do not have shore power where we store the coach. Other question regarding the inverter. It has a huge power area with all kinds of procedures automatically switched.
The inverter indeed might be the problem. This coach is a 2013 but brand new to me. The inverter is the lowest of the gauges on the panel. It was showing 13 volts and I "assumed" it would go out after a time delay. Wrong????
We will actually take the coach out for its first trial run this coming Monday.
My Atwood water heater control board (on the heater) makes a constant high pitched hum when on, gas or electric it doesn't matter, if it is heating is it humming. Only I can hear it. DW and repair techs can't.