Thanks for the reply Old-Biscuit. Yes 12v dc is On, I will look for a fuse. There is a fairly large fuse panel kind of under the bed, could the fuse for this thing be in there? The battery disconnect for the house battery is connected. The converter and other 12 volt stuff seems to work. Lights. Slide out. I did find a red wire that came somewhere from the top of heater and changed into what could be that "thermal cut out". It appeared intact. I'll go out again in the morning and see what I can do. Thanks for the info
