Liebherr Compressor Thermal Overload / Hard Start

Freezer will not restart after being switched off briefly; must wait a long time before it starts again.

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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

Weak compressor, Failing start relay/PTC, High head pressure due to dirty condenser

How to Fix / Troubleshooting

Safety first: Unplug the appliance before cleaning or accessing the compressor.

Steps:

  • Condenser cleaning: Thoroughly clean the condenser coils to reduce compressor load.
  • Allow cool-down: Wait at least 5–10 minutes after switching off before turning back on to allow pressures to equalize.
  • Inspect start device: Check the compressor start relay/PTC for signs of overheating.

Remedy: Replace the start relay/PTC if suspect. If the compressor still struggles to restart, it may be failing internally and require professional replacement.

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Repair Difficulty

Hard 4/5

Required Part

Compressor Start Relay / PTC
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