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    cleanshaven's Avatar
    cleanshaven Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Apr 1, 2008, 08:26 AM
    Cycling on-off before desired temp is reached
    GMP100-3 gas furnace: The furnace runs for 3-5 minutes then shuts itself off for 2-3 minutes then repeats the start- stop cycle. I turned the thermostat up but it still acts the same. Any tips would be appreciate
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Apr 1, 2008, 12:23 PM
    Check the furnace filter to make sure it is clean.
    Could be going out on high limit. Control out of calibration.
    Make sure all registers are open.
    Does the blower work?
    cleanshaven's Avatar
    cleanshaven Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Apr 1, 2008, 09:11 PM
    Yes the blower works and I did clean the filter and it seems to be running all OK. I . Will know better by morning. The filter was very dirty and I ran it with the doors off afterI reinstalled the filter, and ran for 20 minutes without a problem. Thanks for your reply
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