Question about Goodman GMS90703BXA Heater

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Keeps blowing the fuse.

A/C is not working. Found a 3 Amp.fuse blown on a circuit board inside the blower section. I already went thru bunch of fuses.
Manufacturer: Goodman
Model # GMS90703BXA
It seems like a short circuit, but I don't know where to look. Any suggestions? Thank you.

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  • Anonymous Jun 28, 2008

    FUSE BLOWS AFTER ABOUT AN HOUR OF RUN TIME . I'VE ALREADY CHECKED FOR SHORTS IN THE 24V WIRING . A/C BLOWER AND CONDENSER RUN FINE TILL FUSE BLOWS . REPLACED T-FORMER

  • Anonymous Mar 14, 2014

    Door Blower Switch was loose tried to push back in secure and it shorted. The fuse on the board did not blow will the switch prevent communication with the board?

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In more rare scenarios the 24v activated fan relay that is soldered to the circuit board can cause this same problem. I agree with Therinnaiguy, If the fuse is blown 90+% of the time there is a short in the 24 volt control system.

Posted on Jun 17, 2008

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Most likely it's near where the wires got weed wacked outside. Follow the wires from the indoor unit to the outdoor unit. Look for any damage along the way. Also follow any thermostat wires you can find and inspect them. Sometimes where they enter into both the inside and outside units they frey on the metal casing. I hope you find something. Otherwise, you may have a bad transformer sending the wrong voltage to components.

Posted on Jun 10, 2008

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