Neff Defrost System Failure

Excessive frost or ice build-up on the back wall of the freezer.

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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

Failed defrost heater, Defective defrost sensor or thermal fuse, Faulty defrost timer function in main PCB, Door gasket leaking warm air

How to Fix / Troubleshooting

Safety: Unplug the refrigerator before defrosting or testing components.

Steps:

  • Manual defrost: Remove food, open doors, and allow all ice to melt. Use towels to collect water. Do not use sharp tools or hairdryers near plastic.
  • Inspect gasket: Check door seals for gaps or damage. Replace if not sealing properly.
  • Test defrost components: Access the evaporator and test the defrost heater and sensor/fuse with a multimeter. Replace any faulty parts.
  • Control board: If heater and sensor are good but frost returns quickly, the main PCB defrost control may be faulty and require replacement.
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Repair Difficulty

Medium 3/5

Required Part

Defrost Heater / Defrost Sensor
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