Liebherr Defrost System Failure

Heavy ice build-up on the evaporator behind the rear panel; airflow reduced; temperature rising.

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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

Defective defrost heater, Failed defrost sensor/thermostat, Faulty defrost control on main PCB

How to Fix / Troubleshooting

Safety first: Unplug the appliance before accessing the evaporator and electrical components.

Steps:

  • Manual defrost: Remove food, turn off the freezer, and leave the door open until all ice melts. Use towels to absorb water.
  • Access components: Remove the rear interior panel to expose the evaporator, heater, and sensors.
  • Test heater and sensor: With a multimeter, check the defrost heater for continuity and the defrost sensor/thermostat for proper resistance or continuity.

Remedy: Replace any failed defrost components with Liebherr-specified parts. If all components test good, the main control board may not be initiating defrost and may need replacement.

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Repair Difficulty

Hard 4/5

Required Part

Defrost Heater Element
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