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

    Oct 7, 2011, 02:35 PM
    Any other reason for why furnace burner won't stay lit?
    Model: GMP125-4

    Problem: The burner won't stay lit, only light for a 10 second, then gone.

    I've already replaced flame sensor and control limit, the circuit board was replaced in last year.Any other suggestion?

    Thanks a million.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Oct 7, 2011, 03:06 PM
    Could be a bad flame senser wire, or another bad board (not likely), or you may have a partially plugged drain system causing one of the pressure switches to open, or a bad pressure switch. I would start by cleaning the drain hoses and ports they connect to, then if problem still occurs, use a multimeter to see if one of the pressure switches is indeed opening causing the burner to shut down. Can you tell me what brand and year this furnace is, and also are there any led lights on the control board, if so, is it on steady or blinking a code?
    alextui's Avatar
    alextui Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Oct 7, 2011, 07:20 PM
    The brand is goodman(GMP125-4). The light is steady.

    Thanks, I will take a look at pressure switch.
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