Like the title says, my APU is working just fine, and the bunk heater will come on when I turn it off and back on again. But most of the time the heater shuts off within 15-90mins and stays off.
It’s not so cold for the lines to freeze and it started in mid-40 weather. Any advice past going to Thermo King when I take off in 6wks.
Edit: and about 1 out of 10 restarts it will run until I touch something, the temp, add the fan because it got too hot, turn the key left to roll down a window. As long as I do nothing, it’ll keep working occasionally.

