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    Diway's Avatar
    Diway Posts: 2, Reputation: 1
    New Member
     
    #1

    Jul 15, 2006, 02:14 PM
    W2 connect for the HoneywellTH8110U
    We recently moved into new home, existing Thermostat is a TH5220D. I purchased a TH8110U (Programmable) The old unit has a white wire running to the W2. The TH8110U does not have a connection available for the "W2" Question is where do I wire the "White W2 Wire" into the TH8110U

    Thanks :confused:
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Jul 15, 2006, 03:53 PM
    Sounds a s if you have a heat pump, W2 is usually for a second stage of auxiliary or emergency heat. I don't think the new stat you have will work.

    You will need to check your heating & cooling system to be sure all the stages or levels of heat you have to find the correct stat.

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