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-   -   How to wire 5 wire to 4 wire thermostat (https://www.askmehelpdesk.com/showthread.php?t=248289)

  • Aug 12, 2008, 04:56 PM
    jenn37
    How to wire 5 wire to 4 wire thermostat
    I had a 5 wire honeywell mercury thermostat. I have changed it to a 4 wire programmable thermostat. How do I do that? So that I can have heat and airconditioning.
  • Aug 12, 2008, 05:48 PM
    esquire1
    Match the wires from the airhandler to the thermostat R,W,G,&Y. The common "C" will not be used.

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