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    Oyurt7's Avatar
    Oyurt7 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 7, 2016, 04:11 PM
    Concord 80 plus furnace shuts off after a few seconds of start
    Everything I searched was indication of failing flame sensor. I purchased brand new part and a certified hvac technician replaced it but problem didn't stop. The two green lights blink continuously . We couldn't figure out what is wrong.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Feb 7, 2016, 07:39 PM
    Often a vent issue will cause a pressure switch to open & do exactly what you describe. Did your tech check for a good ground?
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