According to the instruction manual you need to drain the machine, open the flap on the front right hand side at the bottom, there is a black tube with a white plug in.
Remove the white plug. Be careful there is a lot of water in it. Then open the pump cover next to it and remove any debris. TURN OF THE POWER SUPPLY FIRST. I have tried all this on my new machine but it is not working, I hope it works for you.
minnsy64, December 2010