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-   -   A/c thermostat malfunction (https://www.askmehelpdesk.com/showthread.php?t=248294)

  • Aug 12, 2008, 05:26 PM
    vornado
    a/c thermostat malfunction
    It is a RobertShaw 9600-

    Setting is for MANUAL

    Temperature in house is 76 degrees

    Manual setting for a/c to come on is 79 degrees.

    A/C comes on. A/C installer told us thermostat unit is BAD. Sold us a replacement.

    Same issue.

    Per RobertShaw help desk " this is a wiring issue"

    Question: What wires could be involved?

    Thanks

    Montaques
  • Aug 12, 2008, 05:46 PM
    esquire1
    You need to check all the low voltage wires from the stat to the airhandler. If the unit is not shutting off, sounds like the wires from R (normally red) and Y (normally yellow) are making contact

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