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

    Oct 26, 2009, 02:53 PM
    Heater clicking on then off
    Okay, first off I have a Lennox Furnace model # G14Q3-60-20 serial # 5890k00091. I replaced my motor last year on it and it was working fine until I went to turn it on this year! It will click on then go right off. After speaking with a guy who works on Lennox Furnaces and he told me that he was 99% sure it was the flame sensor and to take it out and clean it since that is usually the problem 9 times out of 10. So after a while of trying to locate it I found it and cleaned it like they said, and it is still doing the same thing! Please Help!!
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #2

    Oct 26, 2009, 05:57 PM

    A G14 is a pulse furnace. You are pretty good if you were able to remove the flame sensor,they are pretty tricky to get out.

    I need a little more info, how long does it run once it starts to rumble? If it shuts down in a matter of seconds after lighting,most likely you will need a new ignition control.
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