i have a 2017 Forest River 30’ tt ... furnace is blowing fuses immediately upon replacing fuse. i’m not very familiar with hvac, or how the wiring in these things work, looking for some guidance with...
With the wall tstat OFF, the furnace fuse blows? Regardless, you will have to access the 4 wires TO the furnace and the furnace itself. The FIRST thing you do, is, disconnect the 12 volt positive feed wire at the furnace. Replace the fuse, IF it blows, then the problem is between the fuse center and the furnace. If it does NOT blow, the problem is internal to the furnace and the furnace will have to be pulled if your model is not mounted from the outside wall. Doug
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