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    ricca89's Avatar
    ricca89 Posts: 1, Reputation: 1
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    #1

    Jun 27, 2009, 09:11 AM
    Wiring Programmable Thermostat
    Hello,

    I have a Carrier single stage heat pump and I want to update the thermostat to a programmable format. When disconnecting the existing thermostat (which has been working) there is O (orange), G (green) 1, 2 (red wire jumped together), Y1 (red), and W & Y (both are attached to the same wire with a little hump like crimp in wire). I am having a difficult time determining what to do with the yellow wire which has been attached to both W & Y. I am trying to use a Hunter touchscreen programmable thermostat model #44860. In the previous sustem there was a blue, brown, and white wire that was not attached to anything just wrapped together. :confused:
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jun 27, 2009, 06:24 PM
    Hunter,, 1st mistake
    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
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    #3

    Jun 28, 2009, 06:20 AM

    What is your existing thermostat?
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