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

    Feb 2, 2013, 07:52 AM
    Trane tcont900ac43ua code 79 thermostat
    How to fix
    jerry dunning's Avatar
    jerry dunning Posts: 1, Reputation: 1
    New Member
    		  
    #2

    Jun 23, 2014, 06:50 AM
    What does error 91-SYS COMM ERR mean on my unit?
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