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    rebelsinjin's Avatar
    rebelsinjin Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 6, 2009, 08:01 PM
    Furnace won't ignite-blowing cold air
    Hello all, GMP power vented gas furnace won't ignite-blower is blowing cold air-indicator light is flashing 4 times...
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #2

    Jan 6, 2009, 08:38 PM
    Check service label for translation of LED fault code and post here. Look inside blower access panel. Continuous blower operation usually indicates an open limit device.
    rebelsinjin's Avatar
    rebelsinjin Posts: 3, Reputation: 1
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    #3

    Jan 6, 2009, 09:06 PM
    Quote Originally Posted by KC13 View Post
    Check service label for translation of LED fault code and post here. Look inside blower access panel. Continuous blower operation usually indicates an open limit device.
    Does this mean that a limit switch needs to be replaced?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #4

    Jan 6, 2009, 09:12 PM

    Maybe. But it may be as simple as pushing a button on a flame rollout. Have you checked filters lately. There is most likely a reason for limit malfunction
    MarkwithaK's Avatar
    MarkwithaK Posts: 955, Reputation: 107
    Senior Member
    		  
    #5

    Jan 6, 2009, 09:16 PM

    The OP didn't state that the blower was running constantly, just that it was blowing cold. Could just be an ignition failure. Flame sensor perhaps. Need more information to accurately diagnose.
    rebelsinjin's Avatar
    rebelsinjin Posts: 3, Reputation: 1
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    #6

    Jan 6, 2009, 09:51 PM
    Quote Originally Posted by mygirlsdad77 View Post
    maybe. but it may be as simple as pushing a button on a flame rollout. Have you checked filters lately. There is most likely a reason for limit malfunction
    I actually changed air filter about an hour before we noticed no heat coming out just continuous cold air-blower running non stop
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #7

    Jan 7, 2009, 07:04 PM

    Just waiting to hear what the code means. You should be able to find it on inside furnace cover or in furnace manual.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #8

    Jan 7, 2009, 07:11 PM
    Quote Originally Posted by rebelsinjin View Post
    I actually changed air filter about an hour before we noticed no heat coming out just continous cold air-blower running non stop
    Was the heat working before you changed the filter?
    cyberheater's Avatar
    cyberheater Posts: 321, Reputation: 12
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    #9

    Jan 8, 2009, 12:00 PM

    Your thermostat isn't set on "run" instead of "auto" is it.

    Just had to ask
    MarkwithaK's Avatar
    MarkwithaK Posts: 955, Reputation: 107
    Senior Member
    		  
    #10

    Jan 8, 2009, 05:49 PM
    Quote Originally Posted by cyberheater View Post
    Your thermostat isn't set on "run" instead of "auto" is it.

    Just had to ask
    You mean "ON" not "RUN"
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