Re: kenwood kdw234a error code
Ah, Chinese dishwashers – it did one whole wash? For the moment, unplug it. Do not attempt to repair it, as it is under warranty. Personally, I would insist that it was removed and replaced with something of better quality, as you are on a hiding to nothing with one of these.
E4 is overfill. What will have happened is that the water will have leaked into the undertray and it will have continued to heat as the water leaked away – no water = overheat = bang!
Good luck,
Penguin45.