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    gath2's Avatar
    gath2 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 14, 2012, 08:22 AM
    HVAC Blower works in Auto, but not in the ON position
    I have a Lennox 80MGF3/4-100A-1 furnace. According to the stickers it was converted to a heatcraft ignition control board EGC-1 at some point. I just moved into the house and noticed that I can not kick on the blower manually. The Heat and A/C both work fine and it kicks on automatically when needed. However, I'd like to be able to set the fan to ON to circulate air without heating/cooling.

    I thought it might be a loose wire on the thermostat, but everything appeared connected. So I purchased a new thermostat thinking maybe that was the issue. That did not help. I'm assuming this has to be a wiring issue, but know nothing about HVAC. I took pictures of everything that I thought was relevant in case that helps. Does anyone have suggestions for what I can try or what would be the cause of this?

    Pics can be found here:
    Https://picasaweb.google.com/107022855886113072599/FurnaceBlower
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Mar 14, 2012, 11:47 AM
    Are you sure there's a green wire connected to G post on the tstat
    jdublon's Avatar
    jdublon Posts: 10, Reputation: 1
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    #3

    Mar 22, 2012, 05:32 PM
    It sound like you have a problem on thermostat a wiring from the furnace to the thermostat
    smartpp7's Avatar
    smartpp7 Posts: 1, Reputation: 1
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    #4

    Jul 2, 2012, 09:36 AM
    Please email me at [email protected] if anyone has a solution to this problem.

    Thank you!
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