Remove the back panel that is covering the heating element and thermostats, you will need a multimeter to test for resistance between the thermostats and the heating element, or if your appliance has a resettable thermostat try resetting it by pressing the red button on the top. If you dont have a multimeter you can check the thermostats by carefully removing them look on the underside and check if they are still rounded if, depressed then the stat is faulty.
john, July 2007