Miele Dryer F66 Code: Meaning & Fixes
- Meaning
- Airflow fault: air isn't moving through the dryer as it should, most often because of dirty fluff or plinth filters. Miele also lists overloading, poor ventilation and a technical fault.
- Can I fix it?
- Yes, usually a DIY fix
- Seen on
- Miele tumble dryers with fluff filters and a plinth filter behind the heat exchanger access panel, such as condenser and heat pump models. Check your model's manual.
Miele says F66 most often shows because the fluff filters or the plinth filter weren’t cleaned, or weren’t cleaned well enough. It is an airflow fault, so start there: clean both filters, check the heat exchanger for fluff, and don’t overload the drum. If F66 keeps coming back, Miele says call service.
Try this first
- Clean the fluff filters in the door opening and rinse them under warm water.
- Clean the plinth filter behind the heat exchanger access panel and let it dry; don't refit it dripping wet.
- Take some laundry out if the drum is overloaded, then restart.
- Clear anything blocking the vent grille under the door, and open a door or window in a small room.
What causes F66
| Cause | What you notice | What to check |
|---|---|---|
| Dirty fluff filters | Long drying times, fluff visible on the filters | Clean after every drying program |
| Dirty, wet or damaged plinth filter | F66 soon after starting, or right after cleaning | Rinse, squeeze, dry; replace if misshapen |
| Fluff on the heat exchanger | F66 returns even with clean filters | Vacuum lightly with a dusting brush |
| Overloading or poor room ventilation | F66 with large loads or in a closed small room | Smaller load; ventilate the room |
| Technical fault | F66 persists after all checks | Miele Customer Service |
Fix it step by step
Tap a step number to tick it off as you go. Ticks stay on this device.
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Clean the fluff filters
Open the door, pull out the upper fluff filter, remove fluff from all filter surfaces and the laundry deflector, and vacuum the airflow openings. Rinse the filters under warm water and dry them well.
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Clean the plinth filter
Open the heat exchanger access panel, pull out the plinth filter, rinse it and squeeze it out. Dry it between towels. Miele warns not to refit it dripping wet.
Safety: Unplug the dryer before reaching into the heat exchanger area.
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Check the heat exchanger
Look for fluff on the heat exchanger and remove it with a vacuum dusting brush, touching lightly.
Safety: Don't touch the fins with your hands or bend them. Damaged fins can stop the dryer drying.
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Check load and ventilation
Remove some laundry if the drum is packed, clear the grille under the door, and open a door or window while drying.
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Call Miele if it returns
If F66 comes back after cleaning everything, contact Miele Customer Service. Miele lists a technical fault as a possible cause.
When to call a technician
If F66 keeps returning with clean, dry filters, a clean heat exchanger and a normal load, Miele says to contact its customer service for a technical check.
Questions people ask
Why does F66 come back right after I clean the filters?
A wet plinth filter, detergent build-up on it, or fluff on the heat exchanger can all trigger it. Miele says not to refit the plinth filter dripping wet. If it still returns, call Miele.
How often should I clean the filters?
Miele recommends cleaning the fluff filters after every drying program, and the plinth filter when the dryer prompts you.
Can I wash the plinth filter in the washer?
Miele suggests washing it separately without detergent at a low temperature and spin speed if detergent has built up. Replace it if it is damaged or misshapen.