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-   -   Carrier code 45 (https://www.askmehelpdesk.com/showthread.php?t=447323)

  • Feb 15, 2010, 10:03 AM
    M W J
    Carrier code 45
    Carrier furnace flashing a code 45 says replace control. Which control? Control board, thermostat or what?
  • Feb 15, 2010, 02:24 PM
    KC13

    This refers to the circuit board diagnosing itself as faulty. Try powering the furnace off for about 15 minutes. If the code returns, the board is malfunctioning.

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