High-pitched whistling or whooshing noise during operation.

Safety: No internal electrical work is typically required; unplug if removing panels.

• Differentiate normal sounds: Gentle gurgling or whooshing is often normal in wine coolers.
• Check air vents: Ensure internal and external vents are not blocked by bottles or walls.
• Inspect fan blades: Slightly bent blades can cause whistling. Gently straighten them.
• Secure panels: Tighten any loose screws on side and rear panels that may vibrate.