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    CARBOB121's Avatar
    CARBOB121 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 23, 2008, 09:40 AM
    furnace noise
    I have a lennox value series furnace-- about five seconds before the blower kicks in there is a loud humming noise that slowly disappears
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 23, 2008, 10:25 AM
    It might be the motor trying to start. You might try changing the run capacitor for the blower motor.
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