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    Brouk's Avatar
    Brouk Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 25, 2013, 08:03 AM
    About outside AC unit
    Ac fan is working and also the heat, but when I turn on cool in some reason it is not working! I check out side unit a contactor not kick and I checked the inside unit I saw the thermostat wire came from out side unit not hook up with nothing those two wires sit inside the furnace. I am trying to figured out where those two wire hook up and the same time what make a contactor help him to kick? Thanks
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    May 25, 2013, 08:28 AM
    The two low voltage wires from the outdoor unit connect to terminals Y & C on the furnace. A wire also needs to go from Y on the furnace to Y on the thermostat.
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