How do I access the filter for the drain? My washing machine will not drain but is working in all other ways.
I believe there is a panel at the bottom of the front of the machine. It is held in place by a couple of screws that can be removed with a coin or screwdriver - they are not machine screws by larger in size and made for mortals to use. Behind this panel is a filter screen that you must clean; replace it and your machine should work OK. I would check your owner's manual, too, which I am sure has a better explanation of all this. Or Bosch's website.
Just had the same problem, after Much patience and persistence I found the blockage at the y piece that joins the pump to the outlet hose air trap towards the top of the machine LHS with the top and cover off.
It was clogged solid therefore no back pressure on the top little ball valve (between the air trap and the outlet) therefore no seal therefore norain therefore a drain-fault that persists regardless of a cleaned pump filter.
Usually answered in minutes!