So... the saga continues.
I replaced the furnace. I thought with the frequency with which I use it that I could afford reliability. I put in a new 7916-II from atwood, and it works much better, but:
Once in about 3 times trying to start, the t-stat STILL shuts down during the ignition attempt, causing a failed ignition (because it opens the switch which closes the gas valve etc) and starting the whole startup cycle all over again 2 seconds later. This means the furnace will sometimes go through 3, 4, or 5 startup cycles before it actually starts burning gas and producing heat.
I'm at a loss now. The wiring is brand new, the t-stat is brand new (with fresh batteries), and the furnace is brand new. Are programmable thermostats just incompatible with RV furnaces?
