Day & Night
Indoor Blower Motor Failure
Outdoor unit runs but indoor blower does not start; weak or no airflow from registers
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 PSC or ECM blower motor, Faulty blower run capacitor (PSC), Loose blower wheel on shaft, Failed indoor fan relay on control board
How to Fix / Troubleshooting
Safety first: Turn OFF power to the air handler/furnace at the breaker and service switch.
- Step 1 – Thermostat fan test: Set thermostat fan to ON. If no airflow, the blower or its controls are suspect.
- Step 2 – Inspect blower compartment: Remove access panel and check that the blower wheel is intact and not jammed by insulation or debris.
- Step 3 – Check capacitor (PSC motors): Locate the blower capacitor and look for bulging or leaks. Replace with the same µF rating and voltage if defective.
- Step 4 – Motor test: Try spinning the blower wheel by hand. If stiff or seized, the motor must be replaced.
- Step 5 – Board relay: If motor and capacitor are good but no power is sent to the motor, the indoor control board fan relay may have failed and require replacement.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Indoor Blower Motor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements