H i I am having same problem and it seems to be the sump pump that has packed up priced up a new one £48 trying to gat one off ebay to get to it you have to tack all the back off and the fan off the motor the reason it tripps out is condensation collects on the heating element try using a hair dryer in the back of the drum
Hope this is of some help
Bobcat, October 2007