Gaggenau Compressor Start Device Failure

Clicking noise every few minutes, compressor attempts to start but shuts off quickly, little or no cooling.

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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 PTC start relay or start capacitor, Overheating compressor drawing high current, Loose electrical connections at compressor terminals

How to Fix / Troubleshooting

Safety: Disconnect power before accessing the compressor area. High voltage is present.

Steps:

  • 1. Access compressor: Remove the rear lower cover to expose the compressor and start device.
  • 2. Inspect start device: Remove the plastic cover on the compressor terminals. Check the PTC relay and capacitor (if present) for burn marks or rattling pieces inside.
  • 3. Replace start device: If the relay is burnt or suspect, replace the start relay and capacitor with the correct Gaggenau/Bosch kit for your compressor model.
  • 4. Test operation: Restore power and monitor. If the compressor still fails to start and clicks, the compressor itself may be failing and requires professional replacement.
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Repair Difficulty

Hard 4/5

Required Part

Compressor Start Relay and Capacitor
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