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Hi folks, first time on the forum so please forgive any technically inept terminology, but just wanted to seek some advice on an issue with domestic wiring. We recently had a new kitchen installed, and a new 30A circuit was required for an induction hob and double oven. The installers set up a separate consumer unit for this supply. Recently, we noticed a metallic burning smell and a buzzing from under the island unit where the hob sits, which disappeared when the consumer unit was switched off. Last night, we couldn't switch the hob on, and when I looked at the consumer unit, one of the MCB's had tripped. When I reset it, the hob came back on. About an hour later, the buzzing/crackling was back, and there was thin smoke from behind the island so I switched the supply off completely at the consumer unit and called out an electrician. He's now looked at the wiring, and tells me the problem is the (new) dishwasher, which he says has a faulty circuit board that's causing the problem. I'm not qualified to comment, but surely the issue is with the 30A hob/oven supply and not the dishwasher which is on a separate 13A circuit and wasn't even switched on when we had the problem? Any advice you can offer would be most welcome. Cheers.