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-   -   How do you wire an RTH221B thermostat? (https://www.askmehelpdesk.com/showthread.php?t=443683)

  • Feb 5, 2010, 08:24 PM
    alero19
    How do you wire an RTH221B thermostat?
    I am trying to replace my thermostat it is an RTH221B on a Carrier Central A/C, but I do not find the wire color codes on that unit, they use different colors on those wires.
    Thank you.
  • Feb 5, 2010, 09:31 PM
    T-Top

    Tell us the way the old one wired up and the options of the new one.
  • Jun 25, 2012, 09:55 AM
    perand
    The old thermostat terminal are G,F red wire - C grey wire- H orange wire- V white wire

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