Washer-dryer stops heating, clothes come out cold, drying function weak or not working

Safety first: Disconnect power. Heating components can retain heat; allow the machine to cool before working.

• Run a test program: Select a hot wash or drying cycle and monitor if the drum warms at all (do not touch internal parts while powered).
• Access rear or side panel: Depending on model, remove the rear or side panel to access the wash heater (in the tub) and dryer heater (in the air duct).
• Visual inspection: Look for burned connectors, melted insulation, or signs of overheating on heater terminals and thermostats.
• Check continuity: With a multimeter, test the wash heater, dryer heater, and thermostats/NTC sensors for continuity and correct resistance. Replace any open components.
• Professional service: If all components test good, the electronic control module may not be driving the heater relays correctly and should be diagnosed by a Miele-trained technician.