Wine cooler interior temperature fluctuates widely; bottles alternately too warm and too cold.

Safety first: Unplug before accessing sensors or control boards.

Steps to stabilize temperature:

• Use a thermometer: Place an accurate thermometer inside to verify actual temperature swings versus display readings.
• Check loading: Avoid overloading or underloading; a moderate, even load of bottles helps stabilize temperature.
• Test sensors: Measure NTC sensor resistance at known temperatures (e.g., room temperature and chilled) and compare to Hoover specifications. Replace any sensor with erratic readings.
• Reduce door openings: Minimize frequent access, which can cause large swings.
• PCB replacement: If sensors are good and fluctuations remain extreme, the main control PCB may be mismanaging compressor and fan cycles and should be replaced.