mine is the same, it is the valve, spring valve and a rubber ring missing at the back of the drier. tip it up, take water container out and you should see.
morris, April 2011
Mine does the same and I have just spent two hours figuring out how the valve assembly goes back together but with some of the parts clearly missing. I suspect that the valve is held under tension from the spring and a small O ring that stops the valve assembly from being pulled through the valve body and also acts as the valve face. I can't find the O rings listed as a spare part so I will have to try the likes of Maplin etc.
Bigfoot, March 2011
if the water container is a the top then it could be a drain pump issue.If the water container is at the bottom then it could be a blockage or a faulty valve.either way you need to take the top and side panels off to access parts
