Problems with a white knight condenser dryer cl767 blowing fuses.!!!?

my condenser dryer keeps blowing plug fuses.!!! it worked fine, then just stopped, and started blowing fuses in the plug.checked most things, not the heater,not wires. blows the fuse as soon as the machine is switched on at the plug.had it apart and cant see any major fault..but am i missing something.??? i even checked the two overheat sensors on the back of the machine, they are ok also.any ideas what i might try would be fantastic.