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

    Sep 7, 2009, 12:37 PM
    Thermostat to new furnace.
    My thermostat wires are simply black and white but the new furnace has Y W G C R markings.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 7, 2009, 02:32 PM
    You will need to pull a new 5 wire thermostat cable and get a new thermostat designed to work with your system.
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