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Blown fuse on Heat Pump

Posted by hart71 (My Page) on
Thu, Mar 5, 09 at 4:20

I have a Goodman system with a Heat Pump w/ aux heat. I bought a new thermostat for the unit and initially wired it incorrectly, but have since corrected it however the unit won't come on at all. I have checked for a blown fuse, but can't find a fuse at all. There is not one in the disconnect box outside by the heat pump, is there another place it might be? Is there another reason the unit might not be coming on?


Follow-Up Postings:

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RE: Blown fuse on Heat Pump

On my heat pump, a small 3 amp fuse is located on the side of the quick disconnect plug that connects the transformer + and - wire to the main controller board. You cannot see the fuse unless you pull the plug off the contoller board.


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RE: Blown fuse on Heat Pump

Sniffdog is correct. Sounds like the low voltage fuse or the transformer is DOA. Easy way to check is pop your thermostat off and touch the red & green wire together. If everything is ok with the furnace, the fan should kick in. If it does, your problem is else where. If it doesn't kick in, you can check to see if you do indeed have a 3-5 amp fuse inside your indoor unit control panel. If you don't then more than likely you have blown the transformer by wiring the thermostat incorrectly.

*** I highly suggest calling a service tech as this is HIGH VOLTAGE your dealing with and it can be deadly****

Hope this helps


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