F10
Westinghouse
ECM blower communication fault
Furnace shows F10; blower may run at fixed speed regardless of thermostat commands.
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
Failed ECM control module on blower motor, Damaged ECM communication harness, Incorrect dip switch or configuration on IFC, Defective IFC ECM output
How to Fix / Troubleshooting
Safety: Disconnect power before accessing blower wiring.
Steps:
- Identify whether your Westinghouse furnace uses an ECM blower motor (large motor with integrated electronics and multi-pin low-voltage plug).
- Inspect the ECM communication harness from the IFC to the motor for damage or loose connectors.
- Verify that any configuration dip switches on the IFC are set according to the installation manual for your model and blower size.
- If wiring and configuration are correct, the ECM module or entire motor assembly may need replacement.
Note: ECM diagnostics often require specialized tools; professional service is recommended.
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