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

    Oct 6, 2007, 07:37 AM
    Thermostat installation
    I am trying to install a programmable thermostat. I have 6 wires and am not sure why there are 2 yellow ones connected to the same terminal.

    The wires are G, Rc, Rh, W, Y (2 yellow connected to this), and a blue one that isn't used.

    Help!
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Oct 6, 2007, 12:30 PM
    Go to the furnace,check out stat wire from that end ,see what each color is connected to., should be red-to red, white to rc or rh, green to g for fan and yellow to y for a/c,only 4 wire need unless you are talking about a heat pump,
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