Well the furnace and refrigerator are on the same fuse according to the panel. That won't work.
So I tested it and the furnace will run fine on its own. If I just turn the fan on, the AC blower will work fine. Turn it to cool and the furnace kicks on seconds after the cooling begins.
The wires look fine on the thermostat and the power center. Also the thermostat is on the left of the camper with the furnace below it. The AC is on the roof of course. The power center in on the right side of the camper and I mounted the surge box behind it. I may have to see if I can take it to the dealer.