Miele
Compressor Not Starting
Refrigerator and freezer are both warm; interior lights work but there is no humming from the compressor.
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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 compressor, Faulty main control not sending start signal
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the compressor area. Do not attempt to open the sealed system.
Steps:
- Check for clicking: If you hear periodic clicks from the rear, the start device may be trying and failing to start the compressor.
- Inspect start device: Remove the cover on the compressor terminals and check the start relay/PTC for burn marks or rattling. Replace it if it shows signs of damage.
- Test compressor windings (advanced): With the start device removed, measure the resistance between the compressor terminals. Infinite or shorted readings indicate a bad compressor.
If a new start device does not restore operation, contact a Miele technician for compressor or control diagnosis.
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Video Guide
2 VideosRepair Difficulty
Professional Required
5/5
Required Part
Compressor Start Relay / PTC
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