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.
Cooling fan fault for cooking zone 4
Models: KM 7200, KM 7210, KM 7220, KM 7260, KM 7290, KM 7474, KM 7574, KM 7899
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.