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

    Dec 16, 2008, 08:51 AM
    Fan motor runs in intervals of 2sec after heating the house.
    After the furance heats the house and everything shuts off, 2 sec. later the fan kicks on for about 2sec, then shuts off for 2sec. then kicks on again for 2sec. Then off. It does this every time the furnace has kicked on to heat the house. I replaced the thermostat and the problem still exists. Could the thermocouple be bad?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 16, 2008, 10:37 AM
    It is a defective or out of range fan or fan and limit control. They can be adjusted if you know what you are doing.
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