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-   -   Wiring diagram change from Addison Thermostat to a Honeywell (https://www.askmehelpdesk.com/showthread.php?t=280680)

  • Nov 13, 2008, 06:36 PM
    Johnny24
    Wiring diagram change from Addison Thermostat to a Honeywell
    Can someone answer what the w3 wire would need to be hook to on the new Honeywell RTH7400 5-1-1. we are removing a addison thermostat which runs a Gas furnace and a heatpump. Please help with wiring diagram
  • Nov 13, 2008, 07:17 PM
    MarkwithaK

    Have you read the installers guide that came with your stat?
  • Nov 13, 2008, 07:27 PM
    Johnny24
    Yes we have read it there is No mention of a w3 wire and what it connects to
  • Nov 13, 2008, 07:32 PM
    MarkwithaK

    What is it attached to on your furnace?
  • Nov 13, 2008, 07:39 PM
    Johnny24
    Not sure I will try to trace it back tomorrow and get back to you.

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