F12
Miele · Miele TWI 180 WP T1 Heat Pump Dryer with WiFiConn@ct
The lint filter indicator sensor or switch is not reading correctly. Clean the lint filter and reseat it firmly. If the sensor itself is faulty, the dryer either won't start (thinks filter is missing) or won't warn about a full filter. Check sensor wiring and mechanism.
Error F12 on the Miele Miele TWI 180 WP T1 Heat Pump Dryer with WiFiConn@ct means: Lint Filter Indicator / Switch Fault. The top-ranked community fix is “Replace the Lint Filter Indicator Sensor or Switch” (medium difficulty, ~40 min, DIY cost: $5-$15). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · dryer
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many dryer repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $130-$190.
Condensate Pump Failure
Door Gasket / Felt Seal Worn
Drum Support Bearing Worn
Drive Belt Broken or Stretched
NTC1 Temperature Sensor — Short Circuit
NTC1 Temperature Sensor — Open Circuit
NTC2 Temperature Sensor — Short Circuit
NTC2 Temperature Sensor — Open Circuit
The Miele Miele TWI 180 WP T1 Heat Pump Dryer with WiFiConn@ct has 8 other known error codes:
Error code F12 also appears on 3 other Miele models:
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