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    prat01's Avatar
    prat01 Posts: 1, Reputation: 1
    New Member

    Oct 23, 2008, 04:02 PM
    No flame on heat setting
    Lightning hit furnace, knocked out circuit board about 4 months ago. Replaced w/ new. A/c unit working ,but when heat cycle is turned on, unit will cycle to let igniter glow , but will not let gas flow to ignite flame for heat. Any suggestions? Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert

    Oct 24, 2008, 12:54 AM
    Quite a few items can cause this problem especially if the unit was hit by lightning. I suggest calling a professional for ON SITE service. There could be more than one problem and as a safety precaution it should be professionally checked.

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