F8
TCL
Indoor Unit Overheat / Overload Protection (Alternate Code)
Display shows F8 and unit may limit operation or shut down
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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.
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Possible Causes
Blocked air intake or outlet, Dirty filters and coil, Indoor PCB temperature sensor fault, Indoor fan not reaching commanded speed
How to Fix / Troubleshooting
Safety first: Turn OFF and unplug the unit before cleaning.
- Step 1 – Ensure airflow: Move curtains, furniture, or covers away from the indoor unit. Open all louvers fully.
- Step 2 – Clean filters and coil: Wash filters and clean the coil as needed.
- Step 3 – Check fan operation: Run the unit in FAN mode and verify strong airflow. If weak, inspect the fan motor and blower wheel.
- Step 4 – PCB sensor check (technician): A technician should verify the indoor PCB temperature sensor is reading correctly and replace it or the PCB if faulty.
Warning: Persistent F8 indicates overheating that can damage electronics; do not continue to operate without resolving the cause.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Main Control PCB
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