View Full Version : Furnace fuse

07-23-2021, 04:32 PM
I have a 2008 27ft bumper pull Prowler trailer. When I connect the battery, the furnace 15a fuse blows, this fuse provides 12v to the wall thermostat. With no power to the thermostat I have no heat or A/C. I can replace the furnace fuse sometimes as many as 15 times ,then it will quit blowing and the thermostat works and the heat and A/C works. I've gone thru this procedure for the last 2yrs. I've replaced the wall thermostat and had it in the shop 3 times, the shop tells me there's no problem, does anybody has any ideas

07-23-2021, 04:35 PM
Welcome to the forum :wlcm:

What brand and model of furnace and thermostat do you have?