Freezer displays F1; internal fault indicated, often related to control board memory or sensor processing.

Safety: Turn off power before accessing the control compartment.

• Power reset: Switch off the circuit breaker for 10 minutes, then restore power. Observe if F1 returns.
• Inspect control housing: Remove the control cover (often at the top of the cabinet or rear) and check for moisture, insect infestation, or burnt components.
• Dry and clean: If moisture is present, allow the area to dry completely before reapplying power.

If F1 persists after a reset and there is no visible external cause, the main control board is likely defective and should be replaced by a technician, as programming or configuration may be required.