My furnace will only stay lit, and run properly, if the outside access cover is off. When cover and exhaust is screwed into camper, the furnace won’t stay lit. It will lite then go out and keep cycling. What can I do to fix this issue?
Thanks for the reply. It is a 2017 keystone cougar. It stated acting up the end of last winter, it would take 1-3 tries to lite. We are on shore power.We have tried replacing the circuit board, limit switch, the burner head, cleaning the sail switch...
