Display is lit but shows incorrect or fluctuating temperatures.

Safety: Unplug the cooler before accessing sensors or the control board.

Steps:

• 1. Verify with a reference thermometer: Place a reliable thermometer in the center of the cabinet and compare readings over several hours.
• 2. Inspect sensor placement: Ensure the cabinet thermistor is mounted where it can sense average air temperature, not directly against the evaporator or near the door.
• 3. Replace thermistor: If the display is consistently off by several degrees, replace the cabinet temperature sensor with a new Kalamera-compatible thermistor.
• 4. Check wiring and grounding: Inspect sensor wiring for damage and ensure the control board is properly grounded to the chassis.
• 5. Control board replacement: If a new sensor does not correct the issue, the analog-to-digital converter on the main board may be faulty and the board should be replaced.