Product review (4 stars): Whirpool 279816 Thermostat kit or dryer
This is the second one I bought. The first one was faulty and didn't shut off the thermostat, which could have set my whole house on fire!!!!!!  The new one I got seems to work. So when you replace yours, leave the back cover open for an hour or so,while running the dryer, and make sure it does what it's supposed to.