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    eric_G's Avatar
    eric_G Posts: 1, Reputation: 1
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    #1

    Mar 1, 2009, 06:36 PM
    The thermostat is off and the blower won't stop running
    The thermostat is off and the blower won't stop running. I put in a new thermostat but that didn't stop it . I also unpluged the limit switch ans its still blowing. Is there anyone that can help me please?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Mar 1, 2009, 07:03 PM

    Typically the blower relay is fused.

    Possibly a thermostat. Check to see if it happens in AC mode.
    If it does, you can likely eliminate the stat.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #3

    Mar 1, 2009, 08:03 PM
    What brand/model#? Most modern furnaces are equipped with an electronic control system that will run the circulating blower continuously if a limit switch has tripped open. Look for a diagnostic LED that may be flashing - it could provide some clues.
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