Miele washing machine F12 error code
F12 means water inlet fault. 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).
Often fixable at home · Fault type: Electrical/hardware
Safe checks, in order of likelihood
- Turn off the machine, then check the water tap is fully open.
- Straighten the inlet hose and check the filter in the inlet valve for debris.
- If the tap is fine, run the Rinse/Spin programme to reset; if F12 returns, the inlet valve or Aqua-Stop hose may need an engineer.
Call a professional when…
If the code returns after these checks, book a qualified engineer.
Parts usually involved
- Inlet valve
- Aqua-Stop hose