How to Fix / Troubleshooting

Safety first: Unplug the freezer before removing panels or handling wiring.

Check airflow: Ensure vents inside the freezer are not blocked by food items. Blocked vents can cause uneven temperatures and trigger faults.
Test freezer thermistor: Access and measure the freezer thermistor resistance at a known temperature. Replace if out of specification.
Inspect damper (if shared system): On some Café models that share cooling with a refrigerator section, a damper controls airflow. Verify it opens and closes freely and is not obstructed by ice.
Control board: If sensors and airflow components are good, the main control board may not be regulating the freezer zone correctly and may need replacement.

Freezer display shows FZ and temperature may not be controlled correctly

Possible Causes