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    jazzy21's Avatar
    jazzy21 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 4, 2007, 11:30 AM
    Blower cuts off
    When I fire up my furnce after the burners come on the blower comes on and runs for about 3 minutes and then shuts off,then the diagnostic light signals that I have an open limit switch or aux limit switch is open can someone tell me what the problem is and how to fix it
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 4, 2007, 01:38 PM
    Check to make sure your air filters are clean and all registers and return airs are open. If that is OK then you might have a out of calibration limit control.
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