i have the same issue.
i have found the thermostat.
if you open the dryer door then just inside you will see it above the whole. it may be covered in lint so blow it off.
to replace it just remove the top of the dryer and there are 2 screws holding it on :)
try removing the thermostat and puting it in the freezer for a couple minutes the try that. might fix it
gerble1000, August 2013