Display shows ER 31, refrigerator may not respond correctly to temperature settings.

Safety: Disconnect power before servicing sensors.

This code indicates the ambient (room) temperature sensor is faulty.

• Locate sensor: Often located behind a grille on the top or rear of the cabinet.
• Inspect and reseat: Remove the cover, reseat the connector, and check for damage.
• Replace sensor: If the error persists, install a new ambient thermistor.