Wine cooler not cooling at all; interior is room temperature, but lights and display work.

Safety: Unplug the unit before accessing the rear compartment. Refrigerant work must be done by an EPA-certified technician.

Steps:

• Listen for compressor: With power on (before unplugging), check if the compressor hums or clicks. No sound suggests it is not being energized.
• Check condenser fan: If the condenser fan does not run, the compressor may also not be receiving power.
• Test start components: See E5 for testing the compressor start relay and overload. Replace if defective.
• Inspect control board: If start components are good but the compressor never receives voltage, the main control board may be faulty and should be replaced.
• Sealed system diagnosis: If the compressor runs but there is no cooling and the condenser stays cool, there may be a refrigerant leak or internal restriction. This requires professional sealed system service.