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    matty427's Avatar
    matty427 Posts: 2, Reputation: 1
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    #1

    Dec 27, 2009, 06:17 PM
    Replacing Honeywell T8034c1424 - Wiring Dilemma
    I just bought my first house and of course, started my new to-do list. One of the first projects was replacing the old thermostat with a programmable one.

    I'm replacing a Honeywell t8034c1424 with a Honeywell RTH6300B. We have gas heat and central air.

    The problem I'm having is with the wiring and making sure everything is hooked up properly.

    There are 6 wires connected to 5 terminals the old thermostat:

    G - Green wire
    R -Red wire
    W - White wire
    Y - Yellow wire & Red wire
    1 - Red wire

    The Green, White, and Yellow are no problem, but I'm not sure what to do with the other red wires. My new thermostat has 6 terminals:

    G
    W
    Not Used
    Y
    R (jumpered)
    RC (jumpered)

    My assumption is that I connect the R to R and leave the other two red wires (currently connected to 1 and Y) disconnected, but I'm not positive and wanted to get some recommendations for how to proceed.

    Thanks for taking a look and let me know if you need any more information.
    matty427's Avatar
    matty427 Posts: 2, Reputation: 1
    New Member
    		  
    #2

    Dec 27, 2009, 07:06 PM

    I actually just looked at my thermostat more closely and I was a bit mistaken earlier.

    There are only 4 wires going in to my thermostat - RYGW - and there is an additional wire connecting the Y terminal to the 1 terminal. How should I handle that in terms of replacing the thermostat?
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #3

    Dec 27, 2009, 07:11 PM

    Check/note the terminal letters and color of connected thermostat wires at indoor unit. Post back with info.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #4

    Dec 27, 2009, 08:18 PM

    1 may be internal. Meaning it's not another Red wire.

    But R should stay jumpered to RC and call that R.

    I think your on the right track.
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