Lennox 80mgf AC blower not coming on


  #1  
Old 03-10-09, 12:38 PM
M
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Lennox 80mgf AC blower not coming on

I have a Lennox 80mgf AC unit with a egc-1 control board and when the thermostat signals for AC the blower does not come on sometimes. I can thump the relay on the control board and the blower will come on. I ordered a new relay and replaced the one on the control board and I still have the same issue. Any suggestions on what the cause could be before I replace the control board?
 
  #2  
Old 03-12-09, 09:55 AM
J
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I'm guessing this furnace is roughly 10 years old. The egc-1 (made by Heatcraft) is no longer used. Lennox has a new and improved circuit board for this application.

I would go with a new board.
 
 

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