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    jonkenn1's Avatar
    jonkenn1 Posts: 2, Reputation: 1
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    #1

    Feb 12, 2010, 11:16 AM
    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??
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    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.
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    2. jonkenn1's Avatar
    jonkenn1 Posts: 2, Reputation: 1
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    #3

    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
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