Indoor unit displays F8 and may limit operation or shut down.

Safety first: Turn off power before cleaning.

Steps:

• Clean filters: Remove and wash the indoor air filters. Dry completely before reinstalling.
• Clean coil and blower: Inspect and clean the evaporator coil and blower wheel using appropriate coil cleaner and a soft brush.
• Improve airflow: Ensure no furniture or curtains block the indoor unit. Keep doors open to allow circulation.

If F8 persists: The indoor fan motor may be weak or the PCB may be misreading temperature. A technician should evaluate the indoor fan motor and indoor PCB.