Display shows Lo and the unit will not allow setting a lower temperature.

Understanding Lo: Many Arctic King wine coolers display Lo when the temperature is at or below the minimum settable value or when the sensor reads below its calibrated range.

Steps:

• Check actual temperature: Use a separate thermometer to verify the interior temperature. If it is within normal range (e.g., 5–18°C), the display may be misreading.
• Power reset: Unplug the unit for 5 minutes and plug it back in to clear any temporary sensor glitch.
• Inspect cabinet sensor: If Lo persists and the interior is not extremely cold, test the cabinet NTC sensor for proper resistance and replace if it reads abnormally low resistance (indicating a short).
• Check control board: If a new sensor does not resolve the issue, the main control board may be miscalibrated or damaged and require replacement.

Warning: If the interior is actually freezing, unplug the unit immediately to prevent bottle damage and investigate for a stuck compressor relay as described under overcooling faults.