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jonkenn1
Feb 12, 2010, 11:16 AM
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??

KC13
Feb 12, 2010, 11:27 AM
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.

jonkenn1
Feb 12, 2010, 02:17 PM
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