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


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#1 Tomass

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Posted 19 February 2006 - 12:06 PM

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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#2 Service Manager

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    Unsui

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Posted 20 February 2006 - 12:16 AM

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

#3 Tomass

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Posted 20 February 2006 - 04:55 AM

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.

#4 Service Manager

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Posted 20 February 2006 - 05:08 AM

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.

#5 Tomass

Tomass

    Samanera

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Posted 20 February 2006 - 05:30 AM

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

#6 Tomass

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    Samanera

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Posted 20 February 2006 - 09:20 AM

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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