I have this happen to me on a DL63. It is usually due to a small piece of broken glass or plastic blocking the little propellor that pumps the water out, (think of the little paddle in Nemo's tank)
You need to remove the bottom of the machine, undo one screw and twist the pump free, fairly easy, but make sure you turn the power off first. The outlet hose and pump will then be accessible, have a look in and turn the paddle with a screwdriver, bet you will find something blocking it. Shake it out and reassemble. I can't change spark plugs but figured this out so it's not too hard.
Dermot FJ Nolan, December 2007