The Miele Dryer F66 error indicates an airflow problem. This error code typically occurs when there is a blockage in the dryer’s exhaust system, preventing proper airflow. Resolving this issue requires checking and clearing any obstructions in the dryer ducting and regularly cleaning the lint filter. Regular maintenance and cleaning of the dryer’s ventilation system can help prevent the occurrence of the F66 error and ensure optimal performance of the Miele Dryer.

Symptom: The F66 fault occurs during normal operation. The “Clean Air Paths” indicator lights up, the dryer stops working, and it buzzes intermittently for two minutes.

Possible causes: The dryer vent may be clogged or kinked, leading to insufficient airflow. The lint trap could also be dirty, restricting airflow.

Solution: 

• Check and clean the dryer vent and all air paths.
• Clean the lint filter. 
• Clean the heat exchanger and the vent grille (Condenser dryer only).