I'm a little late answering this for you as you've probably bought a new machine already, but hopefully someone else with a similar problem may stumble across this thread, and if one machine gets fixed because of my post, then it's worth it. Ok....so I had exactly the same problem. The washer would fill with water, and fail to drain. The pump would start to work, and no water (or very little) would come out of the pipe. Resolution....remove the blocking article (usually a rogue sock!!) This is how to do it.
1. First unclip the waste pipe from the drain, and blow down it (rather forcefully), if it is a blockage, then you should find it gets easier to blow the longer you do it.
2. Unblock---now the hard bit. You need to get your washer in a position where you can tilt it on its side.
3. Underneath, near the pump, you should see a large black rubber pipe, with a silver clamp around it. Squeeze the clamp together until it frees the pipe from the pump (a pliers seems to help with this).
4. Remove the blocking article and blow down the pipe to make sure there is no other blockage.
5. Clamp the pipe back on again (make sure it's on tight, or you'll flood your kitchen!!!)
6. Put the washer back in place and try it out.
If this has helped anyone, please let me know by sending me an email...my washer was really getting on my nerves and I'd love to be able to have helped someone.... slendrum@tesco.net
Stu, December 2006