Display shows E20; unit may not cool and compressor attempts to start repeatedly with clicking sounds.

Safety first: Unplug the wine cooler. Compressor circuits carry mains voltage and can be hazardous.

Steps to address E20:

• Listen for pattern: If you hear repeated clicks from the compressor area every few minutes, the overload is tripping due to start failure.
• Check supply voltage: Ensure the outlet provides stable voltage within the specified range for your region.
• Inspect and replace start device: Remove the compressor start relay/PTC and overload protector. If they show signs of overheating or rattling internally, replace with a Siemens-compatible compressor start device kit.

If E20 persists with a new start device and proper voltage, the compressor is likely mechanically locked or has internal electrical faults. This requires sealed-system service or compressor replacement by a refrigeration technician.