F20
Miele
Compressor Start / Inverter Fault
Ice maker shows F20, loud clicking or buzzing from compressor area, no ice production
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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 compressor start relay or PTC, Faulty inverter board (on inverter-driven models), Locked compressor, Loose wiring at compressor terminals
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the compressor compartment. Refrigerant system work must be done by a certified technician.
- Listen to compressor: Restore power and listen. Repeated clicking every few seconds suggests a start relay issue; a humming then click-off suggests a locked compressor.
- Inspect wiring: With power off, remove the compressor terminal cover. Check that all spade connectors are tight and not burnt.
- Check start device: Remove the start relay/PTC and shake it gently. If it rattles or shows burn marks, replace it with the correct Miele part.
- Inverter models: If your unit uses an inverter board, inspect it for visible damage or burnt components. Ensure the DC supply and control harness are firmly connected.
- If F20 persists: A locked compressor or failed inverter is likely. Do not attempt to open the sealed system; contact a Miele-authorized service provider.
Warning: Never bypass safety devices or run the compressor directly from mains power.
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Repair Difficulty
Professional Required
5/5
Required Part
Compressor Start Device / Inverter Board
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