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    cwfrankett Posts: 1, Reputation: 1
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    Jan 2, 2012, 08:22 AM
    Replacing a Lennox Thermostat with a Honeywell Thermastat
    I have a Lennox 67K4801 /AAT89B38G1 Thermastat with the following connections:

    O- ORANGE
    G- GREEN
    Y1- YELLOW
    R- RED
    C- BLUE
    W1- WHITE

    I am installing a Honeywell RTH7500 Thermostat. The guide has the following.

    C- BLUE
    G- GREEN
    Y- YELLOW
    W- WHITE
    RC
    R- RED
    W2
    Y2
    So where do I install the orange wire ?

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