Question about Goodman GMS90703BXA Heater

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Goodman GMS90703BXA Heater/AC - 3 Amps Fuse blows

It were working perfectly well for about 6 months. Last winter, suddently stop. I called a technitian, he replace the 3 Amps fuse and the heating start working again. Later, same day, I try to turn on the fan, and the 3 Amps fuse, blow again. Can some one help me with this problems? Thanks.

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  • unity9_24 Jan 26, 2009

    I have the same issue. Can anyone help. three amp fuses are actually hard to find. only place I can find them ast auto stores, and they are hard to come by.

  • fishrays Oct 26, 2012

    Advance Autoparts has plenty. 3.49 for 5..better than Wally World's price.

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It is a problem on your low voltage side. I had the same issue and found that my wire going to my outside condeser had been snagged on a wire hanger in my basement and was shorting out the system. I went a head and replaced the entire wire from my outside unit to my indoor and haven't had an issue since. So my advice is go to HD or Lowes and purchase some 14 gauge wire and replace the low voltage wire. If that doesn't work, then replace the thermistat wire, and thermistat. Great time to upgrate to a energy efficient thermastat.

Posted on Mar 18, 2009

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This fuse is used on the low voltage side of the furnace. All 24 volt controls operate thru it. You may have a short in your thermostst, thermostat wire or even a bad transformer. After replacing the fuse, inspect the wiring in the cabinet as well as the wire heading toward the thermostat for damage. If you find none, check the thermostat for loose wires or contacts. If all else fails, jump out R and W with a small jumper temporarly at the furnace and see if the unit runs. You will have to tape the door switch closed to run it with the panel off. Remember, this will keep the furnace running 100% of the time until you disconnect the jumpers. Not a solution, just a test! If it runs flawless, you have a bad thermostat or wire. Diagnosing a transformer is for a technician.

Posted on Sep 18, 2007

  • fishrays Oct 26, 2012

    Tx. this really helped knowing what the jumping of r&w means...tx again

  • fishrays Oct 28, 2012

    Add a Comment If the red wire will operate the heat with no prob. does this mean the trannsformer is not bad since the red has 24v. ?

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I HAVE THE GMPN 0804 AND IT CAME ON THIS MORNING AND THEN A LOUD NOISE CAME OUT OF IT. I IMMEDIATELY SHUT OFF THE EMERGENCY SWITCH. AFTER A FEW MINUTES I TURNED IT BACK ON AND IT KICKED IN BUT THEN IT MADE A CLICK IN THE FAN ON THE BOTTOM WHICH DID NOT KICK IN AND SMELLED A LITTLE.

Posted on Oct 26, 2009

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