Miele Dryer Not Heating — Causes & Fixes

What Does This Error Mean?

Miele dryers stop heating most often due to a blocked exhaust duct (F18), a failed NTC temperature sensor, or a defective heating element. Start by cleaning the filters and duct.

Affected Models

Miele T1 Dryer
Miele T Classic Dryer
Miele Condenser Dryer
Miele Heat Pump Dryer
Miele Vented Dryer

Common Causes

Blocked exhaust duct (F18) causing safety cutoff to trip
Failed NTC temperature sensor
Failed heating element
Faulty safety thermostat cutting power to the heater

How to Fix It

Clean the lint filter, condenser, and exhaust duct.

This resolves the majority of Miele dryer no-heat faults. Clean the fine mesh filter, rinse the condenser unit (condenser models), and clear the full exhaust duct.
Test the NTC temperature sensor.

Unplug the dryer and locate the NTC sensor inside the drum or exhaust path. Test resistance with a multimeter at room temperature against the spec in your service manual. Replace if outside range.
Test the heating element.

Test the heating coil for continuity. No continuity means the coil has burned out and the element must be replaced.
Contact Miele service for heat-pump models.

Heat-pump dryers operate differently from conventional models. If the above steps do not restore heat, there may be a refrigerant issue or internal module fault that requires a Miele technician.

When to Call a Professional

For heat-pump models or persistent no-heat faults after cleaning and basic testing, contact Miele service — heat-pump refrigerant issues must be handled by a qualified technician.