Reviewed by Miele Repair Editorial Team · Last reviewed August 8, 2026
At a glance
Overview
Written by
Miele Repair Editorial Team Editorial TeamPublished August 8, 2026Updated October 28, 2026Technically reviewed August 8, 2026
Error codeF12
ApplianceDishwasher
Quick answer
A checklist for F12, the blocked or restricted water inlet fault on Miele dishwashers.
Model compatibility
Miele reuses codes across series and model years, so F12 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What thiscode means
The water inlet is blocked or restricted.
F12 checklist
Is the stopcock open? If not, open it.
Is the inlet filter dirty? Clean it as described below.
Is the inlet hose bent or looped? Straighten it.
Is the supply pressure under 50 kPa (0.5 bar)? Then the facility manager or a plumber is the right call.
Cleaning the inlet filter safely
Because an electrical valve sits inside the plastic housing of the connection, never put that housing in water. Turn the machine off, unplug it, shut the stopcock and unscrew the water intake valve. Pull off the seal and extract the plastic filter by its bar with pliers. A rinse under the tap is all it needs. Seat filter and seal properly, reconnect to the stopcock and open it gradually; tighten the connection if you see drips.
At a glance
Code
F12
What it means
The water inlet is blocked or restricted.
What you can check
Make sure the stopcock is open, straighten any bent or looped inlet hose and clean the inlet filter, keeping the plastic valve housing out of water.
When to call a technician
If F12 stays after those checks, supply pressure is under 50 kPa, or the inlet hose is damaged and needs replacing, get a technician.
After the hose check
Keep watching the hose for some time, since kinked plastic can weaken and split. If it is damaged, it must be replaced through Miele customer service.
Other water inlet codes
See F15 and F13, which describe the same blocked or restricted inlet.
Dishwasher repair for the SC service areas
Fault still on the display? Our service-center line is (844) 459-5005, covering the Miami, New York, Houston, Los Angeles and San Diego metro areas. Have F12 and the model number ready, and view dishwasher repair.
Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Get started
Seeing this code on your Miele appliance?
Book a specialist Miele service visit for a clear estimate and approval before any repair. Experienced technicians, clear diagnostics, and workmanship coverage on completed repairs.
