I had problems with water getting into my ACE 30.1 furnace and getting under the control board causing all sorts of weird behavior. Fan would run even with the thermostat off. Even though I have a solid cover, water would get in after every rain and I’d have to open things up and dry off the board, only to do it again after the next rain.
I ended up sealing the top half of the flange the heater enclosure with some rubber weatherstripping. Initial filed repair was using silicon caulk but that was petty messy. Seems to have fixed the problem. I also drilled several holes in the plastic shelf under the board and put a hard plastic shim under it to raise it up a bit. Atwood has a board relocation kit, but they wanted me to go to a dealer to have it installed and wouldn’t send me one.
2017 Thor ACE 30.1
2017 Jeep Cherokee Trailhawk
Roadmaster Falcon All Terrain
RVi Brake 3