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    swhalen1's Avatar
    swhalen1 Posts: 2, Reputation: 1
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    #1

    Dec 12, 2009, 01:13 PM
    wiring Hw programmmable stat to 8 wire
    Trying to wire up a Honeywell RTH2410 and Ive got 8 wires.
    R, T, O, G, Y, X2, B and W.
    Im not clear on the T, and X2. It says to tape off B, and run X2 into Aux terminal with W. No mention of T wire (Brown).
    Should I tape off both T and B? Also, should I combine X2 and W into the Aux terminal?
    Thanks,
    Steve
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Dec 12, 2009, 02:30 PM

    What do you have available on your new stat?

    See: Thermostat wiring colors and furnace terminal designations repair.
    swhalen1's Avatar
    swhalen1 Posts: 2, Reputation: 1
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    #3

    Dec 12, 2009, 02:33 PM

    O/B, Y, R, G and W/AUX
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Dec 12, 2009, 06:43 PM

    Bet you have a Trane system.
    B is likely common, since using O and B is usually done with some zoning systems.
    "T" you will have to tape off.

    You have the wrong stat. You need something with 2 stage heating where the second stage is emergency/aux heat.
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