An F05 code indicates a blockage. I've just resolved mine. It wasn't nearly as complicated as dismantling your machine (as I feared from the previous posts) The water wasn't draining out of the machine because the waste water pipe was blocked. I undid the washing machne waste pipe, from the U bend under the kitchen sink, and sure enough the nozzle was gunked up (from waste going down the kitchen sink). I scooped out what I could with a kitchen knife and set the machine to the "pump out" setting which fired out the rest of the gunk and excess water, into a waiting washing up basin. Now if only I'd realised that sooner, before I thought I had to manually drain the machines drum and flooded the kitchen, I'd be a happy bunny.
Kirsty, October 2010