John Adam's answer works great, and all I will add is clarification as to what (I believe) he means:
- firstly "the pump" is quite a small object, and the best way to identify what the pump is is to line up on the inside of the machine with the filter which is accessible from the outside of the machine (bottom left, facing the front door of the machine).
- secondly, once the three screws are removed, the pump slides out in the direction the screws came out (ie away from the front of the machine). The "unclip" step is after removing the pump.
- thirdly, this and other sites sort of suggest you are fixing "the pump". I doubt anyone actually fixes (though some may replace) the pump. What really happens is that you are "fixing" the flow of water, both through the filter and in the various hoses. Do not try dismantling or shaking the pump :).
- finally, you need to ensure that water can pass through the hose that is connected to the pump (ie water comes from the machine, through the filter, which you can see via the front of the machine, and gets pumped by the pump up the grey flexible waste water hose). So to aid this ensuring the flow of water, once the pump is removed, unclip (ring clip - something like pliers required) the grey hose from the pump housing, unclip the same hose from the wall of the machine about 50cm in (just a holding clip, comes out easily with finger pressure) and then flush/do whatever you do to that grey hose to ensure water can get through it. ie put water in the end that usually is connected to the waste system, and have the other end (which you just detached) in a bucket. Once water is flowing freely, reconnect everything and it will hopefully work great.
(I presume you can read/download your user manual and read how to get rid of the water in your machine, before you start any of the above - particularly before the step where you lay your machine on its side :)
Thanks John Adam
December 2010