Could be a thermistor, thermostat or thermal cutout problem. All can be tested with a multimeter. Check for broken wires on or connecting to the thermistor(NTC temperature sensor), if they are all OK then replace the thermistor. Check all wires and connectors generally for internal breakages - caused by movement of the wiring loom attached to the drum. Over a long period of time the wire strands inside the insulator break through metal fatigue. Although the outside of the wire appears ok the internal is open circuit. Pull on each individual wire - if theyre ok internally, they shouldnt stretch.
Repair and service your own washing machine. Check out www.2ndwave.co.uk/manual.html
dannyboy, March 2009