Written by
Maya Chen Appliance Repair Content SpecialistPublished October 20, 2026
Content statusVerified
Error codeF66
ApplianceDryer
Quick answer
F66 on a Miele dryer is usually about uncleaned fluff filters or plinth filter, overload or blocked ventilation.
Model compatibility
Miele reuses codes across series and model years, so F66 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What thiscode means
Usually fluff filters or plinth filter not cleaned or too wet; also overload or blocked ventilation.
F66 appears in many cases because the fluff filters or the plinth filter have not been cleaned, or were cleaned insufficiently. Overload and blocked ventilation can also be behind it.
Prevention
Clean the fluff filters after every drying programme. Clean the plinth filter straight away when Filter lights up or a prompt appears in the display. This reduces how often F66 shows, or may stop it altogether.
Cleaning the fluff filters
Open the door and pull the upper fluff filter forwards out.
Remove fluff from all the filters and the perforated laundry deflector.
Turn the yellow rotary control on the lower filter in the arrow direction until it clicks, then pull the filter forwards.
Vacuum visible fluff from the upper air flow openings using a long crevice nozzle.
Wipe the smooth plastic with a damp cloth and rinse under warm running water.
Shake and dry the filters carefully; wet ones could cause faults while drying.
Refit the lower filter and lock it, push in the upper one, close the door.
Put the fluff in household waste so it does not reach the waste water.
Other checks
Reduce the load and clear the ventilation grille.
Related codes
F55: damp laundry, another code linked to fluff filters.
When F66 returns despite clean filters, phone our Los Angeles Miele dryer line at (310) 742-0025. We will ask for the model number and which filters you cleaned.
Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Get started
Seeing this code on your Miele appliance?
Book an on-site visit in Los Angeles County or Orange County. We diagnose the appliance that is showing the code and give a written estimate before any repair.
Tell us about your Miele —we’ll take it from there
Request a repair visit for a Miele appliance in Los Angeles County or Orange County. Share the model and symptom — or call and we will take the details.
