first take off back and check thermostats,small button like ojects about asbig as thumbnail 2 of.should be held by i small screw.(be sure to unplug machine) if the one with green spot is inverted(like tamperproof jar top)this is probably the problem .you have to replace both stats (come as kit approx£20).if not could be element!! good luck!
big al.
January 2011