Blower motor does not have enough information, fails to start 40 consecutive times

What is going on

The blower motor failed to start 40 times in a row, and the control says it lacks the information to run it properly. That can mean a data problem in the control module or a rotor that is locked up. Shut off power and confirm the circuit is dead before opening up the blower compartment.

Likely causes

• Error with the integrated control module, such as missing or wrong shared data
• Motor has a locked rotor condition

Check in this order

1. Turn power off before repair and confirm it with a meter.
2. Check the integrated control module and verify it holds the correct shared data set.
3. Check for a locked rotor condition by turning the wheel by hand, and correct it.
4. Use the memory card for the specific model if data needs to be reloaded.
5. Replace the motor with the correct replacement part if needed.
6. Restore power and confirm the blower starts normally.

More furnace guides

• Airflow lower than demanded, furnace runs on low stage when high stage is expected
• Alternate combustion air opening (upflow or horizontal)
• Alternate vent/flue location (upflow or horizontal left)
• Annual inspection checklist
• Auxiliary limit control (location and purpose)
• Auxiliary limit switch open (blower compartment)