SOLVED: furnace and AC fan won't turn on
SOLVED: see my response below for details. In short, replacing the thermostat fuse fixed the issue. Hi All, I have a 1997 Terry 30g RV with an Atwood 8531-III DCLP furnace and a Coleman 7300 a...
Forum Discussion
Edit: After learning a bit more about the wiring, I do think that moving the yellow wire was necessary.
Replacing the thermostat fuse definitely solved the original problem of the AC & fan not working. What caused the fuse to blow in the first place is still unknown.
Once the thermostat was working again, I then discovered the additional issue with the blower not cutting out after 2 minutes. That issue was solved by moving the yellow ground wire (for the relay) to a different connection on the furnace housing. So the other ground connection must have been too corroded.
Replacing the thermostat fuse definitely solved the original problem of the AC & fan not working. What caused the fuse to blow in the first place is still unknown.
Once the thermostat was working again, I then discovered the additional issue with the blower not cutting out after 2 minutes. That issue was solved by moving the yellow ground wire (for the relay) to a different connection on the furnace housing. So the other ground connection must have been too corroded.
