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    PLB9's Avatar
    PLB9 Posts: 2, Reputation: 1
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    #1

    Mar 26, 2010, 07:49 PM
    TRane xr80 issues
    My Trane XR80 furnace is only blowing cold air. The diagnostic light is bllinking 4 times.
    I checked diagnostic codes and this one means (open limit device). Please clarify which part(device) needs to be replaced?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Mar 26, 2010, 11:38 PM
    Most limit devices can be reset,, little button in the center between where the wires connect,, if it opens again,, need to figure out the cause,, maybe overheating for some reason,, they don`t go bad very often
    PLB9's Avatar
    PLB9 Posts: 2, Reputation: 1
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    #3

    Mar 27, 2010, 08:48 AM
    Thanks for the quick respond. I can't find "the little button" to reset the device.
    Please send me a picture or web site where to check how this looks like. Thank you.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #4

    Mar 27, 2010, 12:07 PM

    High limit switch

    http://store.hamiltonhomeproducts.co...-29041-005.jpg
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #5

    Mar 27, 2010, 12:08 PM

    Role out switch

    http://ww2.justanswer.com/uploads/Ma...ut_typical.jpg


    Check gas pressure and change filter if dirty.
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