Tumble Dryer
F17
The F17 error code on a Miele tumble dryer indicates a fault with the humidity or moisture sensor system, which prevents the dryer from accurately detecting when your laundry is dry. It’s a moderately serious fault — the dryer may still run, but drying performance will be unreliable until the issue is resolved.
What does this error mean?
Miele tumble dryers use a moisture sensor (two metal strips inside the drum) to measure the dampness of your laundry and automatically end the cycle at the right time. When F17 appears, the control board is receiving an abnormal or absent signal from this sensor. This usually means the sensor is dirty, damaged, or there’s a wiring fault between the sensor and the PCB.
Est. repair cost
£80–£150 professional repair; £15–£40 DIY sensor part if self-replacing
🔍 Likely causes
🛠️ Step-by-step fix
Run a reset first: switch the dryer off at the plug, wait 10 minutes, then power it back on and start a short cycle to see if the error clears.
Locate the moisture sensor bars — two small metal strips, usually found just inside the drum door opening near the lint filter. Clean them thoroughly using a soft cloth dampened with white vinegar or a small amount of rubbing alcohol. Do not use abrasive pads.
Check and clean the lint filter and condenser unit. A severely blocked condenser can cause erratic sensor behaviour — rinse the condenser under the tap until the water runs clear, then leave it to dry fully before reinserting.
Inspect the sensor strips visually for scratches, corrosion, or physical damage. If the metal is worn through or deeply pitted, the sensor will need replacing — this is a relatively low-cost part (£15–£40) available from Miele directly or UK appliance parts suppliers such as eSpares or BEKO parts.
If the sensor looks intact and cleaning made no difference, the fault is likely in the wiring loom or PCB — do not attempt to open the rear or side panels yourself. At this point, call a qualified appliance engineer.
If the dryer is still under Miele’s warranty (typically 2 years standard, or longer if registered), contact Miele UK customer service directly on 0330 160 6600 before attempting any further DIY to avoid voiding your cover.
📞 When to call a professional
If cleaning the sensor and resetting the machine doesn’t clear the F17 code within two attempts, stop and call a Miele-approved or Which?-endorsed appliance engineer. Tell them: ‘My Miele tumble dryer is showing error code F17 — I’ve cleaned the moisture sensor and reset the machine, but the fault persists.’ This helps them arrive prepared with the right parts.
⚖️ Repair or replace?
A professional repair for F17 — covering sensor replacement and labour — typically costs £80–£150 in the UK. If your Miele dryer is under 8 years old and was a mid-to-premium model (£600+), repair is almost always worth it given Miele’s build quality and longevity. If the machine is over 10 years old and the PCB is at fault, replacement becomes more cost-competitive, especially with current Miele heat pump dryer prices starting around £799.