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    shirley400 Posts: 1, Reputation: 1
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    #1

    Feb 8, 2014, 09:56 AM
    Honeywell thermostt
    Trying to replace a honeywell t87 thermostat with apgrammable rth2300b
    Honeywell I have two wires black and white no marking on the t87 t post
    On the rth2300b do I use

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