Miele Dryer F3 — What It Means & How to Fix It
F3 on a Miele tumble dryer means the drying-air temperature sensor is short-circuited — a technical fault Miele says can't be fixed at home.
What this code means
Miele USA's page reads in full: 'Fault F3 appears on the tumble dryer display. Drying air temperature sensor short-circuited. This is a technical fault that you cannot remedy yourself.' The sensor reports an impossible temperature, and the machine won't trust the heat it produces. There is no owner-level part here — the sensor lives inside the dryer's airflow and electrical system — so after one power-cycle reset, F3 is a booked repair.
Documented by Miele USA for tumble dryers as 'Fault F3'; note the same code number is separate from the dryer's F36/F38/F39 electronics family, so match the page text to your model.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Drying air temperature sensor failed | Occasional | No — technician job |
| Wiring or connector fault at the sensor | Less common | No — technician job |
| Transient — clears with a power-cycle restart | Less common | Yes — unplug and restart once |
What you can try yourself
- Switch the dryer off, unplug it, wait a minute, and restart on a short program to rule out a transient.
- If F3 returns, clean the lint filters as a precaution — but know that sensor faults aren't fixed by filter care.
- Don't open the dryer to reach the sensor: on heat-pump models the sealed refrigerant circuit lives in there.
- Book a Miele-trained technician and quote F3.
When to call a technician
- F3 appears immediately after the reset.
- The dryer gets unusually hot before cutting out.
- Any unusual smell while the machine runs.
Typical professional repair cost: About $150–350 for a technician visit; sensor work is diagnosis plus a modest part.
Frequently asked questions
My dryer stops mid-cycle and shows F3 — is it the filter anyway?
No — F3 is specifically the temperature sensor circuit. A dirty filter shows up as F66 or the 'Clean out airways' light instead.
Can I keep drying with F3 showing?
Not safely — the machine can't trust its own temperature readings, so leaving it running risks overheat. Book the repair.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Miele codes
- Miele Dryer F36 F36 means Miele can't see proof the door is shut — the door contact (reed switch) is faulty, a technical fault for a technician.
- Miele Dryer F39 F39 is the dryer's electronic-fault flag — Miele's page just says 'there is an electronic fault' and that it can't be remedied at home.
- Miele Dryer F66 F66 is the dryer saying its airflow is choked — and Miele's own page says the cause is usually the lint filters or the plinth filter needing a proper clean.
- Miele Dryer Clean out airways light The 'Clean out airways' light is the dryer's polite nudge that the lint filters or the plinth filter in front of the heat exchanger need a proper clean.
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