Do they have trip switches? I thought they just had thermal fuses that melt if they get too hot.
http://www.saunashop.co.uk/res/user/1845_thermal-fuse-600x435.jpg
A trip switch is much more expensive than a simple fuse - a sensible manufacturer would not design in a £5 trip switch (and then hide it inside) when they could get away with a 50p fuse.
Have you been using it to dry clothes and covering up the air holes?
Peccavi
May 2009