Interior temperature fluctuates widely; some bottles are too warm while others are too cold.

Unplug the cooler before checking fans and vents.

• Check air vents: Ensure that intake and discharge vents inside the cabinet are not blocked by bottles or shelves.
• Verify fan operation: Confirm that the interior fan runs when cooling is active. Replace the fan motor if it is intermittent or noisy.
• Sensor placement: Make sure the cabinet sensor is not touching the evaporator coil directly or pressed against the liner; it should sense air temperature.
• Load distribution: Avoid overpacking the cooler. Leave space between bottles for air circulation.

Improving airflow and ensuring proper sensor placement usually stabilizes temperatures.