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    funkybeats86's Avatar
    funkybeats86 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 17, 2013, 08:53 PM
    4 wires red white blue yellow
    Am installing a new thermostat but there is no existing thermostat, just the wires coming out of the wall, Red, White, Blue and Yellow.
    I hooked the Red to R/Rc, White to W, Yellow to Y, Blue to B. the blower comes on and the Thermostat does not display anything on it?
    Could you guys help please.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Sep 18, 2013, 05:11 PM
    Check to what the blue wire is connected at the furnace. My guess is it will be connected to "G". If so and you have A/C on the furnace, you will need to get a thermostat which is battery powered.
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