######## ensure the dryer is unplugged ##########
I had the same problem, if you remove the rear cover and then the element section(two screws) you can then see the two thermostats, the one with the white mark on it has a small hole in the centre, if you insert a thin item ie: cocktail stick and press firmly you will hear a click, the thermostat is then reset and the dryer should then heat up.
cs, September 2008