F9 displayed; the interior LED lighting may flicker or fail.

Safety: Unplug the freezer before working on lighting components.

Steps:

• 1. Check door switch: Ensure the door switch operates the light (see F4 scenario). Replace if faulty.
• 2. Inspect LED module: Remove the light cover and inspect the LED board for burn marks or water ingress. Replace the LED module if damaged.
• 3. Wiring: Check the harness from the LED module to the PCB. Reseat connectors.
• 4. PCB driver: If the LED and wiring are good but no voltage is supplied, the LED driver on the PCB may be faulty. Replace the main control PCB.