Miele Dryer Filter/Vent or Clean Airways Warning Keeps Coming Back After Cleaning

What the Warning Did After Cleaning Changes the Next Step

• Message never cleared: This reset applies only to the exact "Clean the door filter" message. With the dryer on, open the door, clean the filter, close the door, press OK, and then switch the dryer off.
• Returned immediately after washing or refitting a filter: Identify the model first. On TWD360WP, do not run another cycle until the plinth filter is completely dry and seated as its manual shows. For any other model, use its own manual rather than copying the TWD360WP, T8023C, or T9800 procedure.
• Returned during or canceled the next cycle: Complete one model-correct visible check. If the same warning or cancellation returns, stop repeated test cycles and move to diagnosis.
• F55 displayed: F55 is a different exact-code condition: laundry was still not dry after the 180-minute maximum in a residual-moisture program. Use the F55 page rather than treating that code as a recurring plain-language warning.
• F66 displayed: F66 is a different displayed fault, not a substitute name for every Filter/Vent or Clean Airways warning. Use the exact F66 code guidance instead.
• Empty Container displayed while the tank is empty: Leave this warning path and use the Empty Container page. That exact message has a separate container, drain, and outlet-path decision.
• Visible water after cleaning: If water appeared immediately after a model-directed filter, condenser, or heat-exchanger cleaning/refit, stop the cycle and use the post-cleaning leak page. Do not use another warning test cycle to see whether the water returns.
• Stop now: If the breaker trips once, stop using the dryer and do not reset it or run another cycle. Also stop after smoke, a burning odor, scorching, sparks, or abnormal exterior heat.

Why It Returns and What to Check on Your Model

• TWD360WP only: Deeper residue can remain in a plinth filter that looks clean. The plinth filter must be completely dry, correctly oriented, fully inserted, and in good condition; deformation, damage, or poor fit can leave restriction or let lint reach the protected exchanger area. Check the door filters and plinth filter for residue, complete dryness, damage, deformation, and correct fit. If lint is visible on the accessible heat-exchanger fins, use a vacuum cleaner with a dusting brush and pass it lightly over the fins.
• T8023C only: A still-restricted lint filter, removable condenser, lower vent, or room-air supply can keep Filter/Vent active. Follow only the T8023C cleaning and room-air instructions; its removable-condenser procedure does not apply to the TWD360WP fixed exchanger.
• T9800 only: A blocked, kinked, or excessively long exhaust reduces airflow and can keep Check Filter/Vent active. Check the lint filter and only the safely visible part of the exterior exhaust for an obstruction or kink. Full duct length, hidden bends, and inaccessible restrictions require service access.
• Any other Miele model: Use the model number from the rating label to find the matching Miele manual before cleaning another surface. Similar warning words do not prove that two dryers use the same filter or heat-exchanger design.

What Not to Do

• TWD360WP fixed heat exchanger: Do not reach deeper into the exchanger, rinse it, touch or press the fins, bend them, or treat it like the T8023C removable condenser.
• Hidden access: Do not remove panels, use compressed air, move the dryer, or disconnect ductwork to chase the warning.
• Electrical work: Do not test sensors, fans, heaters, relays, controls, live voltage, or bypass any safety device.

What to Record for Diagnosis

• Display: Photograph the exact wording before clearing it.
• Model: Photograph the rating label.
• Return timing: Note whether the message never cleared, returned immediately, or returned during the next cycle, and whether that cycle canceled.
• Completed checks: List only the surfaces checked under the matching model instructions and whether a filter was washed, fully dried, damaged, or refitted.

If the warning persists on a TWD360WP, T8023C, or T9800 after its listed visible checks, the matching manual moves the case to service. Diagnosis should reproduce the exact warning and inspect the complete model-specific airflow path, including inaccessible restriction points, before naming a failed component.