I have a Thor A.C.E 27.1 with 1600 miles on it and had a issue with my furnace when I went to Texas from Iowa. It would start and stop erratically and when we got to Texas it started on it's own with the switch off. I pulled the outside cover and the circuit board was all wet. I removed the board and dried it with my wife's hairdryer and it started working again. The tech support people at Atwood said there has been a change in the cover gasket from a white gasket to a darker gray gasket which might explain the water. I checked for a leak from the outside water hook-up and did tighten up the inside fitting a little. I'm still monitoring the problem and will check with Thor about the cover gasket.