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    cooprider14's Avatar
    cooprider14 Posts: 4, Reputation: 1
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    #1

    May 30, 2010, 02:29 PM
    G8C furnace blowing cold air
    I have a G8C forced air furnace with a diagnostic indicator saying the limit switch is open (4 blinks). If I am looking at the circuit board diagram correctly it looks like the limit switch is a little red dual on/off switch in the upper left corner of the circuit board. The other switch appears to be the pressure switch, which is on. What looks like the Limit switch is off.

    I am not sure this is right and don't want to just flip what I think is the Limit Switch back on, unless I'm sure.

    Anyone know?
    cooprider14's Avatar
    cooprider14 Posts: 4, Reputation: 1
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    #2

    May 30, 2010, 02:38 PM

    I think the manufacturer is York.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #3

    May 30, 2010, 03:31 PM

    The high limit is a 2 by 3 black rectangle pastic with 2 wires going to it. It will be located to the right just above the heat burner box
    cooprider14's Avatar
    cooprider14 Posts: 4, Reputation: 1
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    #4

    May 30, 2010, 07:42 PM
    Is it just a thin plastic plate, below the burners? It's about the size you said, and it's held in place by two screws. Dow do I close it?
    cooprider14's Avatar
    cooprider14 Posts: 4, Reputation: 1
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    #5

    May 30, 2010, 07:44 PM

    That should be "how" do I close it?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #6

    May 30, 2010, 07:52 PM

    Tape it with a screw driver take it out at flip the end with your finger.
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