Tumble Dryer
F15
The F15 error code on a Miele tumble dryer indicates a fault with the heating circuit — specifically a problem the appliance has detected with the heating element or its associated thermal components. It’s a moderately serious fault that will stop your dryer from heating, but some causes are straightforward to resolve yourself.
What does this error mean?
F15 signals that the dryer’s control board has detected an issue in the heating system — most commonly a failed or interrupted heating element, a tripped thermal cut-out, or a faulty NTC temperature sensor. Miele dryers shut down heating as a safety measure to prevent overheating or fire risk. The drum may still turn, but the appliance won’t dry clothes until the fault is resolved.
Est. repair cost
DIY fix: £5–£35 for thermal cut-out or NTC sensor. Professional repair: £80–£160 including parts and labour.
🔍 Likely causes
🛠️ Step-by-step fix
Clean the lint filter and condenser: Remove and rinse the lint filter under the tap, then remove and thoroughly clean the condenser unit (usually behind the bottom panel). Blocked filters are the single most common cause of heat-related faults on Miele dryers. Reassemble and run a test cycle.
Check and clear the exhaust duct (vented models): Disconnect the vent hose from the back of the machine and inspect for blockages or kinks. A restricted vent causes heat to build up and trips thermal safety devices.
Reset the machine: Switch the dryer off at the mains, leave it unplugged for 10–15 minutes, then plug back in and restart. This can clear a temporary fault on the control board.
Inspect the thermal cut-out (intermediate DIY): If you’re comfortable removing the back panel, locate the thermal cut-out — a small disc-shaped safety device on the heating element housing. Use a multimeter to test for continuity. No continuity means it has blown and needs replacing. Thermal cut-outs for Miele dryers typically cost £5–£20 from a UK spares supplier such as eSpares or 4ourhouse.
Test the NTC temperature sensor: With the back panel removed, disconnect the NTC sensor connector and test resistance with a multimeter at room temperature (expect approximately 5–10 kΩ depending on model). A wildly out-of-range reading confirms a faulty sensor — a genuine Miele NTC sensor costs around £15–£35.
If the above steps don’t resolve F15, stop and call a qualified appliance engineer — the heating element itself or the PCB may need replacement, both of which require professional diagnosis.
📞 When to call a professional
Call an engineer if the fault persists after cleaning all filters and vents, resetting the machine, and replacing the thermal cut-out or NTC sensor. Tell them you have an F15 code and that you’ve already ruled out blockage and thermal fuse issues — this helps them prepare and reduces call-out time. Heating element and PCB replacement should always be carried out by a qualified appliance technician.
⚖️ Repair or replace?
A professional repair for an F15 fault typically costs £80–£160 depending on the part required and your location in the UK. Miele appliances are built to last 20+ years, so if your dryer is under 10 years old, repair is almost always worth it given Miele’s high replacement cost (£600–£1,500+ new). If the machine is over 12–15 years old and requires a PCB replacement (£150–£250 in parts alone), replacement becomes worth considering.