Had a similar problem with my Hoover hw1600m washer dryer. Take out three retaining screws at rear that hold on the lid.Take off lid (power off first) there is a little reset button on top of the thermostat switch Watch out it can get very hot!!! Looks something like this - http://www.candmdomesticappliances.co.uk/product.php/1455/0
on top of drum somewhere, press it and it should reset.
Mine tripped again until I checked what was blocking air flow.
At the back end near the bottom is a black rubber elbow connection between the plastic condenser and the drum - fastened with jubilee type clips - I unfastened mine and pulled out a load of fluff and bits of sock my machine had eaten. Put it all back together and its working again. Hope this helps.
Drewble, October 2008
