F5
Mitsubishi Electric
Overheating / High Temperature Protection
Display shows F5; unit may shut down unexpectedly during operation.
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
Blocked air filter or grilles, failed fan motor reducing airflow, clogged condenser coil, faulty temperature sensor near compressor, main PCB misreading temperature
How to Fix / Troubleshooting
Safety: Unplug the unit and allow it to cool for at least 30 minutes before working on it.
Steps:
- Clean filter: Remove and wash the air filter with mild detergent. Dry completely before reinstalling.
- Check airflow: Ensure intake and exhaust grilles are not blocked by furniture, curtains, or dust buildup. Vacuum the condenser coil at the rear.
- Verify fan operation: Turn the unit on and confirm that the fan runs at all selected speeds. If the fan is slow or stops, the indoor fan motor may be failing.
- Sensor check (technician): Inspect and test the compressor discharge or cabinet temperature sensor for correct resistance. Replace if out of spec.
- PCB: If sensors and fan are good but F5 persists, the main control PCB may be falsely detecting overheat and should be replaced.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Cabinet / Discharge Temperature Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements