Goodman 100k BTU Forced Air Furnace(Wont stop running) - Heating, Ventilation, and Air Conditioning (HVAC) - Do-It-Yourself Appliance Repair Help - ApplianceGuru.com: The Samurai Appliance Repair Forums

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Goodman 100k BTU Forced Air Furnace(Wont stop running)

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Posted: Sun Feb 19th, 2006 10:06 pm

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1^st Post

Tomass
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I have a Goodman 100k BTU Forced Air Furnace

Model #GMP100-3 REV B

SERIAL#000261 9551

It has been rather cold here this weekend and the furnace wont quit running and will not raise the temp just hold it steady at about 63-65 degrees. It seems like most of the heat is getting vented up the chimney vent(that duct is the hottest) and the fire doesn't run for very long. About 1-2 minutes every time. I was wondering if this is something I might be able to fix or if I should just call the repair man tomarrow. :yikes:

Seems like it resets it self to often.

Thank you very much!

BTW- I have all new vinyl windows and only a VERY small draft in one door. THis is my first year in this house and I dont know if this is normal or not. Sure doesn't seem like it.

-Tom

joesixpack91578@yahoo.com

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Posted: Mon Feb 20th, 2006 10:16 am

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Service Manager
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Sounds like the furnace blower motor is not running???

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Posted: Mon Feb 20th, 2006 02:55 pm

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Tomass
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The vent blower and main blower are both running. Blower is running nonstop. Starts up and fires for a few minutes and then the fire goes out.

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Posted: Mon Feb 20th, 2006 03:08 pm

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Service Manager
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Do you still have the paper work that came with the furance.
If so find the wiring diagram and locate the high limit safety
switch and by-pass it with a jumper. If the switch is bad the gas will stay on. If the switch is bad replace it. Do not operate the furnace with it jumpered out you could start a fire.

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Posted: Mon Feb 20th, 2006 03:30 pm

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Tomass
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Called a repair. He has detremined it to be the either a cracked heat exchange or the stat limit switch? Something like that I dont remember what he called it. N e ways something more than I want to monkey with. Whoever worked on this furnace before we moved in didn't do a great job! Just enough to get by. Thanks for your help anyways

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Posted: Mon Feb 20th, 2006 07:20 pm

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Tomass
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Repair man came. It had wrong high limit switch(cal or cam limit<whatever>

also had a bent blower motor shaft and bent wheel(blower was thumping pretty badly). The high limit was supposed to be a 290 degree and the one in there was a 120 degree so you can see where the problem was...

Seems to be working great now. has went up 4 degrees in 1 hour(best ever since I lived here).

Thanks again for your help and I really appreciate this web site and will refer anyone to it if they have any problems it's really helpfully to have someone that knows what they are dealing with.

-TOMass

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