Wine cooler not cooling at all; interior is at room temperature, lights may work but compressor is silent.

Safety: Unplug the unit before accessing the rear compartment or control board. Do not attempt sealed system work without proper qualifications.

Steps to diagnose:

• Check basic power: Confirm the outlet has power and the unit's power switch (if present) is on.
• Listen for activity: With the rear panel off, briefly power the unit and listen for compressor hum or clicking. Unplug again before touching anything.
• Inspect start components: Remove the compressor terminal cover and check the start relay and overload for burn marks or loose connections. Replace the start device assembly if damaged.
• Check control board outputs: Verify that the main PCB is sending power to the compressor when cooling is demanded. If not, and sensors are normal, the board may be faulty.
• Professional evaluation: If the compressor receives correct voltage but does not start or is locked, a compressor replacement is required and should be done by a licensed technician.