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

    Feb 11, 2008, 11:11 AM
    Furnace fan goes on when in manual mode but won't work on auto
    This is a 15 old unit I checked it yesterday and everything seems to work all right on manual mode but when turned on auto it fallows all steps but when it sends signal for fan to go on it does not work
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 11, 2008, 12:39 PM
    Defective fan/limit control or a fan relay.

    At least you have heat in the manual blower mode.
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