Miele washing machines use F-number codes. F11 (drain restricted) and F10 (water inlet blocked) are among the most commonly reported; each links to Miele’s own fault page below.
| Code | Meaning | Severity | First action |
|---|---|---|---|
| F10 | Water inlet fault | Often fixable at home | The water inlet is blocked or restricted — no water is reaching the tub, or the flow is too slow. |
| F11 | Drain fault | Often fixable at home | The drain is restricted — water is not draining from the machine within the expected time. |
| F12 | Water inlet fault | Often fixable at home | Water inlet fault: the Aqua-Stop system detected the drum did not fill with water in the expected time (water tap closed, kinked inlet hose, or blocked filter). |
| F20 | Heating fault (Thermostop) | Often fixable at home | The set programme temperature was not reached in the expected time, so the Thermostop function paused the programme. |
| F34 | Door lock not engaging | Engineer usually needed | Door lock — the door could not be locked when the programme started. |
| F63 | Water path control unit fault | Often fixable at home | A technical fault has been detected in the water path control unit — the machine locks itself out. |
Safety first
Unplug before any check. Never open panels beyond the filter flap. Anything involving internal wiring, the heater or gas must go to a professional — see each code page for its "call a professional when" line.