Freezer overcooling; temperature much lower than set, excessive frost on food.

Safety first: Disconnect power before accessing the control panel or sensors.

• Verify setpoint: Check that the temperature is not set too low (e.g., below -24°C). Adjust to a normal setting around -18°C.
• Inspect sensor placement: Ensure the sensor is not directly touching the evaporator or a very cold surface unless designed to do so.
• Power reset: Unplug for 10 minutes, then reconnect and monitor if the compressor cycles off when the set temperature is reached.

When to call a technician: If the compressor runs almost continuously and temperature remains far below setpoint, the thermostat circuit or control board likely needs replacement.