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    acanthus's Avatar
    acanthus Posts: 2, Reputation: 1
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    #1

    Nov 10, 2007, 05:02 AM
    What are the 4 wires in my thermostat?
    The current thermostat (Honeywell digital) has 4 wires w,y,g,and r. But the y is also actually green. I wish to put in a programmable. Does it need to be 4 wire? The system is a/c and gas forced air.
    Thx
    Lance
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #2

    Nov 10, 2007, 05:35 AM
    Great explanation of thermostat wires at https://www.askmehelpdesk.com/heatin...ons-58313.html
    If you only have 4 wires, look for a battery powered one or voltage stealing.
    acanthus's Avatar
    acanthus Posts: 2, Reputation: 1
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    #3

    Nov 10, 2007, 06:38 AM
    Quote Originally Posted by labman
    Great explanation of thermostat wires at https://www.askmehelpdesk.com/heatin...ons-58313.html
    If you only have 4 wires, look for a battery powered one or voltage stealing.
    Thanks Labman. My old Lab, Odie, died a few years ago and I think of him this am as I read your handle. They are good memories.

    Just to confirm so that I don't burn out the system: The following is probably true... R=hot to thermostat,W=heat,Y=cool,G=fan. And I can use any programmable thermostat that is designed for these 4 wires and is battery assisted or steals voltage? Or both... or is it one or the other?

    TIA, and where's the book, Thermostats for Dummies?
    bundy33's Avatar
    bundy33 Posts: 4, Reputation: 1
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    #4

    Sep 23, 2012, 10:46 AM
    I have 4 wires coming from my furnace a green, a red, an orange and a white on my new thermostate it has a green , red, yellow , white connections where do I put the orange one...
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #5

    Sep 23, 2012, 01:28 PM
    Quote Originally Posted by bundy33 View Post
    I have 4 wires coming from my furnace a green, a red, an orange and a white on my new thermostate it has a green , red, yellow , white connections where do i put the orange one.................
    To what terminals on the furnace are each of the wires connected?
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