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1993 Goodman gas furnace keeps blowing fuse when first turned on

I connected the thermostat on a short piece of wire to see if a screw in the wall was shorting to cause the fuse to blow immediately and it still blew. Blower works fine without blowing the fuse.

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  • gmabell
    gmabell Nov 30, 2012

    I was able to purchase a very inexpensive thermostat and tried it, in case mine had n internal short. It worked!!!!! I now have a warm house! Thank you!

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You can take each thermostat wire off the control board and use a ohm meter and test to ground, should not have any resistance. Another way is turn off power take each wire off the board, then place one wire at back on the control board terminals ome at a time, untill the one you get to the one that blows the fuse. If the wires check out good sometimes the thermostat itself can have a internal short and cause the fuse to blow.

Posted on Nov 27, 2012

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