Miele · Professional Troubleshooting Guide
The wash heating element becomes open circuit during a cycle when the machine is full and operating. The cycle will continue but without heated water.
Click steps to track your progress.
Note that the machine will finish the cycle but without hot water.
Turn off the washer dryer's power supply after the cycle finishes.
Wait for 30 seconds and then restore power.
Try selecting a wash program with heated water to check if the issue persists on the next cycle.