Blomberg Insufficient Cooling / Partial Refrigerant Loss

Freezer runs but does not get cold enough; temperature remains above -12°C even after many hours.

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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

Low refrigerant charge due to micro-leak, Restricted capillary tube, Weak compressor, Condenser coil heavily clogged with dust reducing heat rejection

How to Fix / Troubleshooting

Safety first: Unplug the freezer before cleaning coils or removing panels. Sealed system work (refrigerant) must be done by a licensed technician.

Airflow and condenser check:

  • Pull the freezer away from the wall to ensure adequate ventilation space.
  • Remove the rear lower panel and inspect the condenser coil for dust and lint buildup.
  • Clean the condenser thoroughly with a soft brush and vacuum. Avoid bending fins.

Door and gasket check:

  • Inspect the door gasket for gaps, tears, or warping. Close a sheet of paper in the door at various points; it should have firm resistance when pulled.
  • Adjust hinges or replace the gasket if sealing is poor.

Evaporator frost pattern:

  • After several hours of operation, remove the interior rear panel and inspect the evaporator.
  • A healthy system shows an even frost pattern across most of the coil. Frost only on a small section near the inlet suggests low charge or restriction.

Corrective actions:

  • Non-sealed system: Ensure condenser is clean, fan (if fitted) is running, and door seals are good.
  • Sealed system issues: If the frost pattern is poor or the compressor runs continuously without reaching temperature, contact a certified refrigeration technician to check for leaks, restrictions, or a weak compressor and to recharge or repair the system as needed.

Test: After cleaning and gasket adjustments, allow 24 hours of operation and monitor temperature with a freezer thermometer.

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Repair Difficulty

Professional Required 5/5
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