I was getting my TM ready for a camping trip to Bristol next weekend. I was testing out all of the gas applicances, and everything worked fine except the furnace. I wanted to make sure it would work ok on battery. I moved thermostat lever from off and the blower came on for about 30-45 seconds and went off. I could never get it to come on again even on shore power. I know the fuse isn't blown because my radio is still running, and it uses the same fuse. I have taken the cover off of the thermostat to check things, but I really don't know what I am looking for. I have read most of the furnace posts on this site as well as elsewhere on the internet. Everything points to a thermostat problem up to and including replacement. Before I do that, I figured I would see if anyone had any troubleshooting ideas. I will add that my TM was new in Sep and has only been used once. I did test the furnace on the first trip, and it seemed to work ok.
I had a similar situation at home recently with the electric clothes dryer. I was certain that it was one of the two thermostats causing the problem, but wanted to determine which one.
A thermostat is nothing more than a switch. It is either open or closed. For my dryer one is used to control the temperature of the heat and the other is a safety switch incase the first one fails and things just get too hot.
I disconnected the pair of wires from one thermostat at a time and shorted them together. Sure enough, when bypassing one thermostat it started working. So now I knew which one to replace.
My radio is on a fuse by itself. My furnace blower is on a fuse by itself. Use a volt meter to determine if you have power at the blower motor.
Furnace Blower Won't Come On
Linear Mode
