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

    Jan 7, 2011, 03:41 PM
    Furnace workes sometimes
    I have a Bryant Plus 90 Furnace about 20 years old. Don't run every often. We have secondary heat. I turn the thermostat up in the morning works good for
    Several cycles then it want come on any more until I go turn the power switch off and on.
    Comes on works fine for a few more cycles then want come on.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Jan 7, 2011, 05:49 PM

    Try cleaning the flame senser. When it gets dirty, the furnace will operate speratically.
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