Freezer is too cold; items are rock-hard and temperature is far below the setpoint.

Safety: Overcooling is not immediately dangerous but can increase energy use.

Steps:

• Verify with thermometer: Place an appliance thermometer inside to confirm actual temperature.
• Adjust control: Turn the thermostat or digital setting to a warmer position and monitor for 12–24 hours.
• Check thermostat (dial models): If the compressor runs continuously regardless of dial position, the temperature control thermostat may be stuck closed and should be replaced.
• Check sensor (electronic models): Inspect the cabinet temperature sensor for proper mounting and test its resistance. Replace if readings are out of spec.
• Control board: If thermostat/sensor are good but the compressor never cycles off, the main control board may be defective and require replacement.