Display shows FZ error; freezer temperature control may not respond; freezer may be too warm or too cold.

Safety first: Disconnect power before accessing freezer panels, fans, or wiring.

Step 1 – Confirm freezer performance:

• Use a thermometer to check actual freezer temperature.
• Note any frost patterns or unusual noises.

Step 2 – Check freezer fan and airflow:

• Listen for the evaporator fan when the compressor is running.
• If silent, access the fan behind the rear freezer panel and inspect for ice blockage or motor failure.
• Replace the freezer evaporator fan motor if it does not run.

Step 3 – Test freezer thermistor:

• Locate the freezer thermistor and test resistance at known temperatures.
• Replace if readings are out of specification.

Step 4 – Inspect wiring and control board:

• Check harness connections between the freezer components and the main control board.
• If components test good, the control board may not be regulating the freezer correctly and may need replacement.

When to call a technician: If FZ persists after fan and thermistor checks, professional diagnostics are recommended.