Posted: 28/04/2013 at 17:29
Im an electrician and DF3 has pretty much summed it up. If it has a heating element in it the likelihood is that the element has burnt out and the lack of resistance is causing the breaker to trip.
Get the warranty out.
Dishwashers are notoriously difficult to fix as the parts are difficult to gain access to without the right tools. Manufacturers often fit screws with unorthodox heads on them so you have to have one of their "engineers" out to be repaired. Sneaky sods.
N.B They've never been engineers in their life, it's just that hotpoint or zanussi or whoever made the machine call them engineers so as to justify the massive cost of getting someone out to repair the machine.