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    honeywellEW07's Avatar
    honeywellEW07 Posts: 3, Reputation: 1
    New Member
     
    #1

    Nov 27, 2007, 06:16 PM
    Heat will not run long
    Just wondering if there was some help out there for a heating problem. Done a thermostat
    change,went from a T874R 1046 TO A Honeywell digital RTH3100C,Cooling and fan works great,problem is,heating part will only run for a few minutes,it's a YORK heat pump unit all elec.This is my wiring at the unit...
    RED-R
    YELLOW-Y
    GREEN-G
    BROWN-W2
    WHITE-W1
    ORANGE-O
    BLUE-C
    OLD THERMOSTAT WIRING.. T874R 1046BASE
    W-WHITE
    B-BROWN
    G-GREEN
    R-RED
    X-N.C.
    H-N.C.
    O-ORANGE
    Y-YELLOW
    T-N.C.
    NEW RTH3100C THERMOSTAT
    E-BROWN
    AUX-WHITE
    Y-YELLOW
    G-GREEN
    O-ORANGE
    L-N.C.
    R-RED
    B-N.C.
    C-BLUE
    Did find a setup in the guide for auxiliary,emergency,and temp setting have that set right..
    Still heat will not stay on long.. Can anyone help me PLEASE... THANKS..
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Nov 28, 2007, 05:34 AM
    Here is a copy of your old thermostat wiring diagram. Now that you have both the old and new that came with your new thermostat it shpould be a snap to wire. If unsure always tract the colored wire back to the unit ans see where it goes.

    http://customer.honeywell.com/techli...0s/69-0392.pdf

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