Freezer is too cold; items are rock-hard and ice crystals form heavily on food.

Safety first: Unplug the freezer before accessing any internal controls or sensors.

• Step 1 – Adjust temperature setting: Raise the set temperature by 2–4°F and monitor with an appliance thermometer for 24 hours.
• Step 2 – Verify actual temperature: Place a thermometer in the center of the freezer. If it reads below -5°F (-21°C) even after adjustment, suspect a control issue.
• Step 3 – Inspect thermistor (electronic models): Locate and inspect the freezer thermistor for damage or loose connections.
• Step 4 – Check mechanical thermostat (if equipped): Rotate the thermostat knob through its full range. If the compressor never shuts off, the thermostat may be stuck closed.

Persistent overcooling with a functioning sensor or thermostat points to a faulty main control board, which should be replaced by a technician.