Freezer temperature fluctuates widely; sometimes too warm, sometimes too cold, without changing settings.

Safety first: Unplug the freezer before accessing sensors or control boards.

• Check installation location: Avoid placing the freezer near heat sources or in unheated spaces with large temperature swings.
• Inspect sensor wiring: Locate the freezer NTC sensor and ensure its wiring is intact and connectors are tight.
• Check control board connectors: Reseat the sensor connector on the main board.
• Replace suspect components: If fluctuations persist, replace the NTC sensor or thermostat first. If still unresolved, the main control board may need replacement.