How to Fix / Troubleshooting

Safety first: Turn off power at the disconnect. Fan blades can start unexpectedly and cause injury.

Steps:

1. Try spinning fan blade: With power off, gently spin the fan blade by hand. If it is stiff or grinding, the motor bearings are failing.
2. Inspect capacitor: Locate the dual run capacitor. If it is bulged, leaking oil, or rusted, replace it with an identical µF and voltage rating.
3. Check wiring: Ensure all fan motor leads are connected to the correct capacitor terminals and contactor lugs per the wiring diagram.
4. Restore power and test: If the fan still does not start but the compressor runs, the motor is likely failed and must be replaced.
5. Do not run unit without fan: Operating the compressor without condenser airflow can quickly cause damage.

Indoor blower runs but outdoor fan does not, compressor may or may not run, unit hums

Possible Causes