Carrier 58MVP Error Code 41: Blower Motor Fault

What Does Code 41 Mean?

Status code 41 on the Carrier 58MVP is a blower motor fault. It sets when the variable-speed (ECM) blower fails to reach 250 RPM or fails to communicate with the control within its time limits — 30 seconds after being turned on, or 10 seconds during steady-state operation. After two successive cycles it escalates to lockout code 15.

The 58MVP's communicating ECM blower reports its RPM back to the control board. A missing or out-of-range signal indicates the motor, its module, or the wiring harness has a problem. The most common cause is a failed ECM blower motor.

ECM blower diagnosis and replacement involve line-voltage and control wiring and are professional repairs, not homeowner tasks.

What You'll Notice

• The blower does not run, runs erratically, or fails to reach full speed
• Little or no airflow from the registers during a heat call
• The board LED flashes code 41 and may escalate to code 15
• Humming or jerking from the blower without proper rotation

Common Causes

How This Is Diagnosed

A technician checks the ECM motor's line-voltage supply, control signal, and RPM feedback, inspects the motor module and harness, and rules out a seized bearing or obstructed wheel. They determine whether the motor, module, or wiring is at fault before replacement. This is line-voltage and control work for a professional.

When to Call a Professional

This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:

• The blower will not run or cannot reach full speed
• Airflow is weak or absent during heating
• The code recurs or escalates to lockout code 15
• The blower hums, jerks, or makes bearing noise

✓ Verified against manufacturer service manual — March 2026