This make numbers its errors per platform rather than per appliance. Three dishwasher schemes, five washer code families, dryer codes that change form with the control board, two induction families that share no numbers at all. Reading a string against the wrong table produces a confident answer and the wrong part.
So identifying the platform is real work with a real value, and it is sold as a job in its own right — credited in full against a repair booked in the same visit.