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

    Nov 3, 2008, 02:38 PM
    RTH6300B uses 5 wires mine is 6 wires
    Do I need 6 wires and the 6th wire is marked W2. Where does that connect to?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 3, 2008, 02:54 PM
    You probably have the wrong type of thermostat. You probably need a 2 stage heat thermostat from the limited info provided.
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