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I'm looking for assistance with troubleshooting a Goodman GMP100-4 Series furnace. I'm unable to find a local service company that know how to troubleshoot the problem.

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I hope I can help, what is the problem?

Posted on Dec 09, 2008

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HIGH VOLTAGE SUPPLY. Open high voltage control box and turn off power by pulling dissconnect or switching off breaker.

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A local company installed an Amana VHC18C2C heat pump to a Goodman "A" coil on my existing natural gas furnace. They did not use a thermostat that is made for a heat pump and tried to wire it for...

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Jul 22, 2011 | Amana Heating & Cooling

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I had an 80% goodman put in and the installer piped in the venting to the exsisting flu which has a tie in from my Hot Water natural draft Tank. Now there looks to be problems with condensing flu gasses...

They need to be seperate to function properly. They just to the shortest route they could get away with saving some time. B vent has to be double wall furnace pipe all the way through seperate from any other pipe. Call them back out, or call you local gas company at know charge, and tell them you believe tou are having problems with flue gasses escaping. They will come right out to check it for you.
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I have a Goodman Manufacture furnace, model #GMPN120-5. The furnace keep clicking on /off while asking for heat. I even turned the fan to the on position (instead of auto) and the problem continues. ...

Can you tell me if the burners are lighting at all? I need a little more information about the cycle. If the burners are lighting and then going off immediately you need to clean the flame sensor. A small rod on the opposite end of the burners from the glow bar. Let me know if this is the situation, or describe the cycle completely and I will try to help.

Mar 19, 2011 | Goodman Heating & Cooling

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What happen when your hvac blows cold air and the heat is set at 73

Sounds like you have a thermostat problem. If your thermostat is not triggering the furnace to ON/HEAT you will not the heat you desire. IF you know how to trigger the furnace you could jump your furnace controller wires BUT DON'T do this. Instead, get another thermostat and try it. But be sure to get the same rated thermostat... take it with you when looking for a replacement.
Not sure about everything going on with your unit based upon what you provided but your thermostat should show the current temp and the temp you set. It also show the mode that the thermostat is in (HEAT / COOL / AUTO) Manually select heat, then increase temp above the current temp setting. listen for furnace to activate or wait a few minutes for warm air output. If not, you'll have to see assistance trom a local heating and cooling company.

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look in your local yellow pages under air conditioner distributors for a local goodman distributor. A local company installed it but they all buy from a area distributor. call them with the previouse owners name and they may be nice and give you the name of the guy who installed your unit it is under warranty. be persistant good luck

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