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

    Sep 19, 2007, 01:30 PM
    Thermostat wiring
    I have a TM 1400HC-E-F Thermostat. Purchased a Honeywell RTH3100C

    Wires on my unit w2=white, O=orange, X=blue, R=red, Y=Yellow, G=green, E=black and W3=Brown

    Honeywell unit has E
    Aux
    Y
    G
    O
    L
    R
    B
    C

    Thanks in advance of any help.:)
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #2

    Sep 19, 2007, 05:16 PM
    Looks like you have a three stage heating thermostat and the new one is a two stage,
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