Found this on another site::
Unplug the appliance from the wall socket.
Turn the machine around and at the bottom right you'll see a plastic box /cover with two hoses going into it.
Open this cover and you'll find the drain pump and float switch. Check that the float isn't stuck.. If the container is full of water then check the pump isn't blocked or jammed. ***(Use a multimeter to test for continuity across the pump terminals.)*** WARNING! LIVE ELECTRICAL CONNECTIONS!!! UNPLUG DRYER FIRST*********
Finally, check there are no blockages in the hoses.
This worked for my dryer.....
Pete
May 2009