Chosen Solution

Kitchen aid dishwasher is washing well but is noisy especially when beginning. It sounds like electric transformer in the rain. Loud buzzing which is returning during wash cycle. However it washes well.

Could be water inlet valves.

I agree, inlet value, it is a magnet value when turned on you hear the magnet working. fallow your water inlet line, to find a small part with electric wires coming out of it. buy a new one