Miele · Professional Troubleshooting Guide
The relay controlling the heating element is stuck, which can cause continuous heating or prevent any heating at all during the cycle.
Click steps to track your progress.
Turn off the washer dryer's power supply immediately.
Allow the appliance to cool down completely.
Check that the earth connection to the appliance is good and secure.
Reset the appliance by turning off power for 30 seconds and then restoring it.