Your pump, sump or drain hose is possible blocked through limescale build up or an object has come out of your cothers and worked its way through the machine. Most w/m have an access at the bottom front of your appliance behind the plastic kickplate to check the filter - twist it anti-clockwise to check inside the pump filter. You will have to pull appliance forward and jack up the front with a bowl underneath to collect the water...
Hotpoint -JC-
July 2008