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

    Apr 27, 2014, 01:17 PM
    Replacing theromstat with HoneywellRTH2300;
    The old unit has W2 wire... no place on new unit other than W to install.

    So far nothing...

    Had to tape off a C wire, if that helps.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Apr 27, 2014, 07:43 PM
    If the old stat had a W2, you probably have a heat pump with 2nd stage heat (most likely electric). The thermostat you bought is not compatible with such a system. https://customer.honeywell.com/resou.../69-2448ES.pdf
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