Miele · Professional Troubleshooting Guide
The NTC (Negative Temperature Coefficient) thermistor, which measures water temperature, has detected a general fault.
Click steps to track your progress.
Turn off the dishwasher's power supply.
Allow the appliance to cool down completely.
Reset the appliance by turning off power for 30 seconds and then restoring it.
Try running a rinse cycle to see if the error persists.