My dishwasher is tripping the electric.

Usually time to replace the heating element. The element is sealed inside a metal tube packed with a dry powder to insulate it. If the outer tube leaks (and it only takes a pinhole), the powder gets wet and stops insulating. It only takes a tiny earth leak to take modern trips out.

If your dishwasher is one of those where the element is visible in the bottom of the compartment you load the dishes into, replacing it yourself ought to be straightforward. If it's buried in the works, whether you want to tackle it yourself or pay someone else to do it depends on how confident you are.

Either way, it shouldn't be catastrophically expensive.

A.

Check the whole drain tray hasn't come away from the base - like mine has. Buy a Bosch - Indesit are a peice of shite.