What the control board is reporting, and which models and series this code applies to. Diagnosis on Miele appliances uses factory service software and procedures.
Refrigerant temperature sensor (1R30-33) open-circuited
Models: TWR 780, TWR 860, TWL 780, TCJ 680
A fault code identifies what the control detected, not which part failed. A sensor error can be the sensor, the harness, the connector, or the board reading it. ServiceON is a factory-authorized Miele service provider.