The refrigerator displays incorrect temperature readings when compared to a separate thermometer.

Safety first: Unplug the refrigerator before accessing sensors or the control board.

• Verify with an accurate thermometer: Place a reliable thermometer in a glass of water inside the refrigerator and compare the readings after several hours.
• Inspect thermistor placement: Ensure the refrigerator thermistor is properly clipped to the liner or in its housing, not dangling or touching the cold air outlets.
• Replace thermistor: If the readings are consistently off and other causes have been ruled out, replace the refrigerator thermistor.
• Control board: A persistent incorrect reading after sensor replacement may indicate a faulty main control board, which requires professional diagnosis.