Disconnect from mains and pull the dishwasher out, take off the right hand side panel. You will see there are about 10 screws to be removed before the side panel will come off. If you know what the thermostat looks like you will find it near the rear of the machine with two wires attached to it. Disconnect the two wires and unscrew with a small spanner (should now unscrew easily)
harry
March 2010