Miele Washer F1 — What It Means & How to Fix It
Also shown as F 1 on some models.
F1 on a Miele washer is a short circuit in the heating/water-temperature sensor circuit — a reset is worth one try, then it's technician work.
What this code means
Miele USA's page for F1 on washing machines and washer-dryers defines it tightly: 'Short circuit in heating/water-temperature sensor circuit.' The machine reads the NTC temperature sensor as permanently wired or stuck, so it can't trust its own water temperature and stands down the heating. Domex's guidance echoes the same family: a five-minute off-at-the-wall reset first, then a look for corrosion around the sensor wiring, and anything deeper is sensor or control-board work behind the front panels.
Documented by Miele USA for Miele washers/washer-dryers as 'Fault F1'; its sibling F2 is the open-circuit twin, and some sources print the pair as F1/F2 together.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| NTC temperature sensor failed short-circuited | Occasional | No — technician job |
| Water ingress or corrosion at the sensor wiring | Occasional | Limited — visual check |
| Transient fault clearing with a power-cycle reset | Less common | Yes — off at the wall five minutes |
What you can try yourself
- Switch the machine off at the wall and leave it for five minutes, then switch on and run a short cold program to test.
- If F1 returns, don't dismantle the front panels unless you're comfortable — the sensor lives behind them and needs a multimeter to test.
- If you do look, check the sensor wiring for corrosion or water marks and report what you find to the technician.
- Book a Miele-trained repair for sensor or control-board work.
When to call a technician
- F1 appears again on the very next cycle.
- Visible water damage or corrosion around the electronics.
- A burning smell from the machine.
Typical professional repair cost: About $150–350 for sensor or board diagnosis with a Miele-trained technician.
Frequently asked questions
Can a washer still wash with F1 showing?
It can run, but with heating disabled — so it won't wash hot. Since the sensor guards the heater, it's safer to sort F1 before trusting the machine with a full load.
Is F1 the same code on both old and new Miele washers?
Largely yes — F1 for the sensor short circuit is very stable across Miele washer generations, which is why it's one of the first codes owners recognize.
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 Washer F2 F2 is the open-circuit twin of F1 — the temperature sensor reads disconnected, so the heater stands down until a technician confirms the sensor or wiring.
- Miele Washer F10 F10 means the washer isn't getting enough water — closed stopcock, blocked inlet filter or a faulty inlet valve — and the first fixes are all done at the plumbing, not in the machine.
- Miele Washer F11 F11 on a Miele washer is a drainage fault — usually a blocked debris filter, a kinked hose or a failing drain pump, and the filter clean is a safe first move.
- Miele Washer F20 F20 says the washer's heater isn't getting the water to temperature — a reset is safe to try, but element and sensor testing is multimeter work.
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