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-   -   Honeywell Thermostat RTH6350D extra wire (Brown X)? (https://www.askmehelpdesk.com/showthread.php?t=547166)

  • Jan 23, 2011, 05:51 PM
    cbeetch
    Honeywell Thermostat RTH6350D extra wire (Brown X)?
    I have attached all the wires into the labeled connector but I have a brown wire with an X label remaining. Does it double with another wire in one of the connections?
  • Jan 23, 2011, 06:12 PM
    T-Top
    How did your old thermostat wire and the options of the new thermostat? All info will help.
  • Jan 23, 2011, 06:34 PM
    cbeetch
    Old thermostat was a RUUD (also the brand of my gas heater and heat pump) dial style. The old thermostat had a place for all the wires. I now have an extra brown wire labeled "X".
  • Jan 23, 2011, 06:36 PM
    cbeetch
    This new thermostat is digital opposed to the dial. My old thermostat had the option to run aux heat (heat pump) and emergency heat (no heat pump).
  • Jan 23, 2011, 07:03 PM
    T-Top
    Once again not knowing your system and setup its hard to say. X maybe common or the circuit for aux heat.
  • Jan 23, 2011, 07:41 PM
    cbeetch
    I figured it out. The brown wire "X" is for the unit power. The Honeywell RTH6350D uses a battery for power and so this wire needs to be taped off and left open.

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