Wine cooler not cooling at all, display is on but interior remains at room temperature

Safety: Unplug the wine cooler before removing the rear cover or touching any electrical parts.

Diagnostic steps:

• Listen for compressor: With the unit plugged in and calling for cooling, listen at the back. A healthy compressor will hum quietly. Clicking every few minutes without sustained running suggests a start issue.
• Check condenser fan: If the condenser fan is not running, the compressor may also not be powered. This can indicate a control PCB fault.
• Inspect start relay: Remove the plastic cover on the compressor terminals. Check the PTC relay and overload protector for burn marks or cracks. Replace the compressor start relay/overload if damaged.
• Measure voltage (advanced): With extreme caution and only if competent, measure mains voltage at the compressor input when it should be running. No voltage indicates a control or wiring fault.
• Control PCB: If the compressor never receives power but the display works, the main control PCB relay may have failed and require replacement.

Important: If the compressor is receiving power but does not start or runs very hot without cooling, it is likely failed internally. Compressor replacement must be done by a qualified refrigeration engineer.