I had the same fault code, F -05 and last week called out the washing machine repair man, cost me £45 and he found 2 small stones in the pump. Machine did the dame thing today, and so I looked for what the code actually meant. Read the other answers to this question, and did what was suggested. Turned the machine off, and tipped it backwards with a bowl underneath. Took the front bottom strip off, there are three gaps at the top where you can lever it off from. Turned the black plastic screw at the front whilst the water came out, and then out with the water came some small sticks, (obviously from small boys pockets), stuck my fingers in and pulled out all the bits of sticks. Screwed it back up and ran a spin and empty cycle. Still hadn't worked, but when I repeated it there were more bits of sticks, which I pulled out (had to use tweezers to get them all out having spun the insides with my fingers) and then machine emptied and finished fine. Would definately recommend anyone trying it, very simple, not dangerous, and you are not near any electonics etc.
Ros Carter, June 2007