Hello, I have a Carrier furnace that is suddenly blowing the 3 amp fuse. I finally isolated that the COM terminal is blowing the fuse. If I connect the blue t-stat wire to it, the fuse will blow. I did this by disconnecting each terminal wire one at a time (W-R-G etc) I am pretty sure that having the t-stat (furnace)in the "off" position, it did not blow. I think it happened when the furnace was turned on at the t-stat. I did so much trouble shooting, I'm forgetting what I did. I already had the a/c wires disconnected. Is this a circuit board problem? Thanks for any help
No announcement yet.
3 AMP fuse keeps blowing out on Carrier furnace