Liebherr Compressor Not Starting

Freezer not cooling at all; interior warm; compressor not running; display may be on.

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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 compressor start relay/PTC, Open thermal overload on compressor, Defective main control board output

How to Fix / Troubleshooting

Safety first: Unplug the freezer before accessing the compressor area.

Steps:

  • Listen for sounds: When powered, a healthy compressor will hum quietly. Repeated clicking without humming suggests a start device issue.
  • Access compressor: Remove the rear lower cover. Inspect the start relay/PTC on the compressor for burn marks or melted plastic.
  • Check wiring: Ensure all connectors are firmly attached and not corroded.
  • Basic reset: Leave the unit unplugged for 30 minutes to allow the compressor overload to reset, then reconnect and observe.

Remedy: If the compressor still does not start, replace the start relay/PTC with a Liebherr-approved part. If the compressor remains silent or overheats and trips, a professional should test the compressor windings and control board.

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Repair Difficulty

Hard 4/5

Required Part

Compressor Start Relay / PTC
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