Miele [F11] fault codewhat it means and how to fix it

F11 appears when there is water in the wash cabinet that should have been pumped away, and it is one of the codes Miele hand back to the owner with real instructions rather than a booking link. They go further than most manufacturers here: the article walks through removing the non-return valve and cleaning the drain pump itself, with photographs. That is unusual, and it reflects the fact that a blocked drain pump is a mechanical obstruction rather than a failure. Miele publish two separate versions of this article and it is worth making sure you are reading the right one, because the machines differ internally. One covers the G 1000 through G 6000 generations. The other covers G7 series and G5 Discovery machines from year of manufacture 2019 onwards. That split is the only year marker Miele publish anywhere in their dishwasher support, which makes it a useful landmark for working out roughly which generation you have. The fact that you have been given instructions at all is the most useful thing about this code, and it is worth understanding why, because it tells you how much of your own time to spend before reaching for the phone.

Miele publish 45 dishwasher codes and for roughly half of them the entire article is the name of a component, a sentence saying the fault cannot be remedied by the owner, and a link to book a repair. F11 is emphatically not one of those. Landing on a code where Miele are willing to photograph the inside of the pump housing for you means they expect the cause to be something you can lift out with your fingers, and on a machine that has been in service a few years it usually is. The distinction that matters most in practice is between water that will not leave and water that should never have been there, because they look identical when you open the door on a stopped machine and standing water. F11 is the first of those: the drain path is obstructed and the machine has given up waiting.

If instead the base tray beneath the machine has filled, that is F70 and the Waterproof System, which is a leak rather than a blockage and carries a completely different instruction — close the stopcock and stop. And if the cabinet is empty rather than full, the problem is at the other end of the cycle and belongs to the water intake codes. One more thing worth knowing before you start: the two most common causes of this code are not inside the appliance at all. A dishwasher that shares a waste pipe with the kitchen sink depends on that pipe being clear, and a blocked sink trap or a plug of fat where the hose joins the household waste will stop a perfectly healthy machine. If the sink beside it has also been draining slowly, start there rather than with the pump.

1. 1

   Switch the machine off and disconnect it from the mains before putting a hand anywhere inside. Miele are explicit about isolating before this job.

2. 2

   Bail the standing water out of the cabinet with a jug and a sponge until you can see the base clearly — Miele’s own wording is to scoop the water out using a small container.

   If the programme stopped while hot, give the water time to cool before you start. Miele’s warning for this job is about glass: risk of injury from glass splinters, which are especially difficult to see in the drain pump.
3. 3

   Remove and clean the filter combination in the base of the cabinet. Miele’s sequence: turn the handle backwards to release it, lift it out, press the recessed grips together to open the filter flap, rinse every part under running water with a soft brush, close the flap so the catch engages, refit it flat in the base and turn the handle forwards until both arrows point towards each other, which locks it. On G7 and G5 Discovery machines from 2019 Miele have you take the lower spray arm off first.

4. 4

   Follow Miele’s own instructions for your generation to lift out the non-return valve and check the drain pump impeller for obstructions. On G 1000 to G 6000 machines the sequence is: press the catch on the non-return valve inwards, tip the valve inwards to release the cover, clean it under running water, then press a small sponge through the drain pump impeller, remove anything hard, and check the impeller turns by hand — Miele say you will feel a little resistance, which is normal. On G7 and G5 Discovery machines the part is called the drain pump cover rather than the non-return valve, but the catch-and-tip release is the same. Use a torch and look before reaching in — broken glass is the usual find.

   Check which article applies to your machine. Miele publish separate guidance for G 1000 to G 6000 machines and for G7 and G5 Discovery machines from 2019 onwards.
5. 5

   Refit the valve by placing it down vertically from above so it sits flush with the edge and the catch engages completely, refit the filter combination so it lies flat in the base of the cabinet, restore power, and run a programme to confirm the water is pumped away.