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-   -   Code 33 after blower motor replaced (https://www.askmehelpdesk.com/showthread.php?t=446290)

  • Feb 12, 2010, 11:16 AM
    jonkenn1
    Code 33 after blower motor replaced
    I have a Bryant 350MAV, just replaced defective blower motor (siezed up) and now the furnace starts to produce heat and after a few minutes the burners shut off and I get a fault code 33. What do I do??
  • Feb 12, 2010, 11:27 AM
    KC13
    1 Attachment(s)
    Code 33 is a limit circuit fault. Most likely, the furnace is overheating for some reason. Is the replacement motor OEM or aftermarket? If a universal aftermarket motor was used, was the rotation set correctly? If running backward, inadequate airflow will cause overheating. Check page 15 of the attachment for other possibilities.
  • Feb 12, 2010, 02:17 PM
    jonkenn1

    Thanks, I found that the new motor was in fact running backwards, causing the furnace to overheat. I switched the motor to the correct rotation and everything is fine now

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