Problem with 80MGF - http://www.hvacmechanic.com/ Forums
Original message
| gmayer
 |  "Problem with 80MGF"
, posted Sun 27 Apr 14:20  
I have an 80MGF3/4-100A-7 SN 6397C 11487 that will work fine and then decide to not heed calls for heat. Once the furnace is powered off and restarted it works fine for a while.
We had a cheap thermostat that has been replaced with a Honywell Environcom. The problem still exists and I am looking for any input. Not sure which number is the main board on this device - 28K6201 maybe?
Any assistance would be greatly appreciated.
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Replies:
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| yuri
| "Re(1):Problem with 80MGF" , posted Sun 27 Apr 14:30:
I am a Lennox tech and work on lots of them. Recommend you get a Lennox dealer to check the unit. Could be any one of a dozen problems. Burners/flame sensor need cleaning, check pressure switch/draft etc etc. Some of those boards last about 10 years and the replacement is a complicated retrofit.
Yuri
[this message was edited by yuri on Sun 27 Apr 14:31] |
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