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    coxrox2's Avatar
    coxrox2 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 15, 2007, 10:04 PM
    Heat cuts on and off in three second intervals when on auto
    Help, my heater (heat strip) cuts on and off constantly,
    The fan and everything shuts down and kicks right back on,
    The ac works good, but the heat will only stay on when its on fan mode..
    But even then you can tell the heat strip is cutting off and on..
    Thanks,
    John
    Nashville tn
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 16, 2007, 05:01 AM
    Lack of air flow. Check and clean your air filter first.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #3

    Nov 16, 2007, 07:42 PM
    Some of the older units used a fan limit switch to bring on the blower after the heat strips have kicked on. Do you know the age and make of your system?
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