Freezer temperature fluctuates widely; sometimes too warm, sometimes overly cold.

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

Verify settings:

• Check that the set temperature is appropriate (typically around -18°C).
• Disable super-freeze or holiday modes if active.

Check sensor placement:

• Locate the cabinet NTC sensor behind the liner or in a sensor housing.
• Ensure it is properly clipped in place and not hanging loose or touching the evaporator directly.

Test sensor:

• Disconnect the sensor and measure resistance at a known temperature; compare to expected NTC values.

Corrective actions:

• Reposition sensor: Secure the sensor in the correct location away from direct airflow from vents.
• Replace sensor: If readings are unstable or out of range, install a new Blomberg-compatible NTC sensor.
• If fluctuations persist with a good sensor, the main control board may be regulating poorly and require replacement.

Test: Monitor temperature with an accurate thermometer over several days to confirm stability.