How to Fix / Troubleshooting

Safety: Unplug the unit and allow it to cool before servicing.

Steps:

1. Check placement: Ensure the unit has adequate clearance around all sides and that the exhaust hose (for portable units) is not kinked or blocked.
2. Clean filters and coils: Wash the air filter and vacuum dust from the evaporator and condenser coils.
3. Verify fan operation: Turn the unit to fan-only mode and confirm that both indoor and outdoor (condenser) fans run smoothly. If the condenser fan does not run, test and replace the fan motor or capacitor.
4. Inspect exhaust hose: Ensure the hose is as short and straight as possible and properly connected to the window kit.
5. Sensor check: If airflow is good but F5 persists, test the relevant temperature sensor(s) and replace if faulty.

Note: Persistent overheat errors after cleaning and fan repair may indicate a refrigerant or compressor issue requiring professional service.

Portable Frigidaire AC displays F5 and may stop cooling or run only the fan.

Possible Causes