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    149st mike's Avatar
    149st mike Posts: 1, Reputation: 1
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    #1

    Jan 3, 2008, 11:41 AM
    What are the color wire scheme for a four wired thermostat system
    Have a thermastat system (four wire) that was disconected without being labeled need to know the color code for the wires
    therinnaiguy's Avatar
    therinnaiguy Posts: 153, Reputation: 5
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    #2

    Jan 3, 2008, 01:13 PM
    Verify at your heating system but typically, R to red (there may be a jumper to R2), W to White, G to Green and Y to yellow. You may have a B or C terminal and a Blue or Black wire, check at the furnace cuircuit board and attach the same way to your thermostat.
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #3

    Jan 3, 2008, 02:45 PM
    https://www.askmehelpdesk.com/heatin...tml#post268211
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