41
Keeprite
Blower Motor Speed or Fault (ECM Error)
Furnace LED shows code 41; blower may run at incorrect speed or not at all.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
ECM motor communication failure, Incorrect blower speed programming, Loose ECM harness, Failing ECM module
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the blower compartment.
Steps:
- Inspect ECM harness: Ensure the low-voltage communication plug and high-voltage power plug are fully seated on the ECM motor.
- Check for water damage: Look for signs of condensate leakage onto the motor or harness. Correct any drain issues.
- Verify dip switch or jumper settings: On models with configurable airflow, confirm that the control board switches are set per Keeprite installation instructions for your system size.
ECM diagnostics and replacement typically require specialized tools and should be performed by a qualified technician.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
ECM Blower Motor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements