There may be fluff in the tube. What I did with mine was take the top off (there are two screws at the back) and you will see the tube that runs up the back of the machine. Take it out of it's white plastic holder and blow down it. Also check that there isn't any fluff in the white plastic tube (a bent paper clip does the job nicely). Then put it all back together, empty the water that has collected at the back of the machine and away you go. It worked for me! Good luck!
Sam
September 2008