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goodman furnace blower buzzes, doesn't blow and then turns off

Asked Dec 9, 2007, 02:57 PM — 3 Answers
Hi, I'm new to this forum and wonder if someone could help me out. I recently came home and noticed a bad smell in the house. I wondered if it was gas, but my wife described it as a burning rubber smell. This is what is happening. The furnace turns on. The flames are burning real good and everything seems ok. The blower turns on. However, it makes this annoying buzz and just keeps buzzing. After a little while (maybe 30-60 sec) the furnace shuts down (i.e. The fames go out). I conclude that the furnace shuts down because it detects that the blower isn't blowing. This cycle just continues over and over. I checked for loose wires and tightened the connections on the thermostat. I recently had a heating guy come out to check the level of carbon monoxide. He said that it was excellent. 1-2 parts per million I think. Also, I replaced my old honeywell thermostat about a month ago. The furnace worked fine until now. Maybe I hooked something up wrong and it took until now to "burn" some wiring. I wondered if I connected the wires up correctly.

Here are the specs:

Goodman gas furnace (1993)
GMPN080-4 Rev B

Hunter thermostat 44155C

Any thoughts would be helpful...our home warranty just expired 4 days ago. Funny how that happens. Thanks.

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3 Answers
hvac1000's Avatar
hvac1000 Posts: 14,539, Reputation: 2381
Heating & Air Conditioning Expert
  
#2

Dec 9, 2007, 04:44 PM


The blower motor is probably shot.
The smell is called askrill because the windings are burning up in the motor.
Make sure to get a new capacitor when you get the new motor.
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topsy's Avatar
topsy Posts: 2, Reputation: 1
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#3

Dec 9, 2007, 08:10 PM
Thanks. That's what I'm thinking...the red light by the blower blinks 4 times... Indicating a problem with the limit switch or something. I'm going to have someone check it out tomorrow. I was hoping I could fix it myself. Do you think I should even try?
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hvac1000's Avatar
hvac1000 Posts: 14,539, Reputation: 2381
Heating & Air Conditioning Expert
  
#4

Dec 9, 2007, 09:15 PM


Quote:
Originally Posted by topsy
Thanks. That's what I'm thinking...the red light by the blower blinks 4 times... Indicating a problem with the limit switch or something. I'm going to have someone check it out tomorrow. I was hoping I could fix it myself. Do you think I should even try?

4 blinks is a open limit switch. Probably from the blower not working. A limit switch is a safety control.
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