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

    Sep 17, 2012, 09:52 PM
    Coleman gas furnace troubleshooting model#7700a series 856
    Pre fan starts but won't ignite
    crabby22's Avatar
    crabby22 Posts: 1, Reputation: 1
    New Member
    		  
    #2

    Oct 29, 2012, 06:36 AM
    Furnace runs for short time turns off maybe 5-7 minutes starts again back and forth want can it be furnace 10 yrs old
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #3

    Oct 29, 2012, 08:05 AM
    The thermostat might be exposed to a draft of cold air.
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