This will most likely be a thermostat that has gone.
They come as a kit and both need replacing. They are located above the heater element which is behind the cover at the rear of the machine. Just a simple matter of removing about a dozen screws.
You can purchase the stat kit from us here - just copy and paste in to your browser the following link:
http://www.ukapplianceparts.com/laundry_models.asp?search_fd3=Thermostats/Kits&search_fd17=tc71pe
If your stats have a green spot on the you need 1701583, and if your stats have a red spot then you will need 1701557.
Lee, June 2007