Wine cooler not cooling at all; interior is at room temperature, display appears normal, but no compressor or fan noise.

Safety: Unplug the unit before accessing the rear compartment or compressor terminals.

Steps:

• 1. Confirm no operation: Set the temperature to the coldest setting and close the door. Listen for any hum or fan noise. If completely silent, proceed.
• 2. Check power: Verify the outlet has power and the unit's power cord is firmly plugged in.
• 3. Access rear components: Remove the rear lower panel to expose the compressor, condenser fan, and control board (if rear-mounted).
• 4. Inspect start device: Remove the compressor start relay/PTC and overload. Look for burn marks or rattling pieces. Replace if damaged.
• 5. Check wiring: Ensure all wires from the control board to the compressor and fan are connected and not burned or broken.
• 6. Control board output (advanced): With proper safety precautions, a technician can test for voltage at the compressor terminals when cooling is demanded. Lack of voltage with a good board input suggests a bad PCB.
• 7. Replace faulty parts: Replace the start relay/overload first. If the compressor still does not run and windings test good, replace the main control board. If the compressor windings are open or shorted, a sealed system repair is required.