Replacement HVAC blower motor fails within 24 hours?

Question

My unit is a Carrier Infinity (FE4ANF003T00ABAA) with an ECM 3.0 blower motor.

To start, the thermostat reported a “Code 41 - Blower Motor Fault”. I ordered a refurbished motor + control module online and a surge protector (didn’t have one previously) and installed it. Ran it through the 5 minute heating diagnostic with no issues, but within 24hrs it had failed with a “Code 44 - Cannot Communicate with Blower” error.

I called up the company and they sent a new control module. Before installing the new control module (on their motor, not the original), I tested for signs of shorting with the multimeter, but resistance readings looked okay.

After attaching the module and reinstalling, it again ran fine through the 5 minute diagnostic, but within 24 hours failed again with Code 44.

I tested that the board is sending 12V to the motor controller and tested with and without the surge protector.

Anyone have suggestions on next steps? Any help is appreciated!

Answer 1

There was an issue with the refurbished replacement motor/parts.

I purchased another replacement motor from a different retailer and it has been working without issue for about the past year.