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My 3 amp fuse blows on my Carrier furnace due to Com terminal
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 try replacing the t-stat already. I already had the a/c wires disconntected also. Is this a circuit board problem? Thanks for any help
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