Grundig Thermostat / Sensor Calibration or Damper Stuck Open

Refrigerator compartment too cold, food freezing on top shelves.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty refrigerator NTC sensor reading too warm, Air damper stuck in open position, Incorrect temperature setting, Main PCB misregulating compressor run time

How to Fix / Troubleshooting

Safety: Unplug the refrigerator before accessing sensors or damper assemblies.

  • Verify settings: Ensure the refrigerator temperature is not set too low. Adjust to a higher setting and monitor for 24 hours.
  • Check air vents: If cold air is blowing strongly on items near the vent, move sensitive foods away from direct airflow.
  • Inspect damper: Access the air damper at the top rear of the fridge compartment. Check if the flap is stuck open. If so, clean any ice or debris and test operation.
  • Test refrigerator sensor: Measure the NTC sensor resistance and compare to expected values. Replace with a Grundig-compatible sensor if readings are off.
  • Monitor after repair: Restore power and check temperatures with a thermometer over 24 hours.
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Repair Difficulty

Medium 3/5

Required Part

Air Damper Assembly
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