Samsung RB Series Refrigerator Error Code d on Refrigerator Display
Samsung RB Series Refrigerator Error Definition = Refrigerator Defrost Sensor
How To Fix/What To Check = Disconnect power to the refrigerator and check the wire harness in the refrigerator defrost sensor circuit.
If the wiring connection checks good then replace the refrigerator defrost sensor.
If the issue is not resolved replace the electronic control board.
Parts That May Be Needed To Repair Refrigerator = Refrigerator Defrost Sensor or Electronic Control Board