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-   -   My honeywell thermostat is showing a code of -AC (https://www.askmehelpdesk.com/showthread.php?t=54590)

  • Jan 14, 2007, 11:32 AM
    remory
    My honeywell thermostat is showing a code of -AC
    My honeywell thermostat is showing a code of -AC what does that mean?
  • Jan 30, 2007, 12:13 AM
    foghorn
    Thermostat is operating on backup batteries until the unit is mounted on the wall plate and the system is powered.

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