Safety: Unplug the appliance and allow it to cool fully.

1. Clean accessible filters: If your De Dietrich combo has a user-accessible lint filter or condenser, remove and clean it thoroughly under running water. Dry completely before refitting.
2. Internal duct cleaning: Remove the top and rear panels to access the dryer air path. Vacuum lint from ducts, fan housing, and around the heater. Ensure the fan wheel spins freely.
3. Check dryer NTC sensor: Locate the dryer temperature sensor (often clipped to the duct). Disconnect and measure resistance; compare to service values. Replace if open, shorted, or reading abnormally.
4. Moisture sensor (if present): Some models use metal strips inside the drum as a moisture sensor. Clean them with a non-abrasive cleaner to remove detergent film that can prevent proper sensing.
5. Test run: After cleaning and reassembly, run a short drying cycle with a small load to verify improved airflow and temperature rise.

Warning: Excessive lint build-up is a fire hazard; regular cleaning is essential.

Washer-dryer displays E12 during drying; drying performance is poor and cycle may end early

Possible Causes