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

    Oct 13, 2010, 07:41 PM
    Trane thermostat TCONT900Ac43UA is registering err code 22
    With red light on top right corner. Ac is blowing cold air, so what does this mean?
    keithhafer's Avatar
    keithhafer Posts: 1, Reputation: 1
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    #2

    Dec 28, 2010, 08:42 AM
    Make sure your vent to the outside is not blocked. I had this problem last night. We had a couple feet of snow and the CO exhaust vent was blocked. As soon as I cleared the vent the error went away and the heat worked fine.
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