Hi, my husband just solved this problem on our machine. Isolate from the mains and remove the panel on the front bottom on the machine - need a star key to get it off. Inside there is a round plastic thing with 2 wires coming out of it - that is a float switch. We dried out the bottom of the machine with towels an carefully dried the float switch. This solved the problem.
Good luck.
Kirsty., January 2011