Noise in the dishwasher Ariston HIO 3C23 WF ⇐ Hotpoint-Ariston

[Guest]

Hello. The dishwasher simply starts humming when connected to the network (it is turned off), here is a video with the sound of this process:
Washes normally, there are no errors and there haven’t been any, power supply 220-230V, normal grounding, water: pressure, hoses according to instructions, etc. In general, everything is ok, but it buzzes when the power supply is turned on. Naturally, I removed and checked everything that can be removed without disassembling: filters, trays, injectors. The hum is clearly localized under the bottom, namely hum, vibrations, etc. no, when turned on, the hum is simply partially drowned out by the operation of the mechanisms. The closest analogue in terms of sound is a live transformer with a loose package of plates, but it’s not there?
Too lazy to take it out of the kitchen, perhaps one of the SPECIALISTS has come across this? Operating time 1.5 years, no more than 1 time in 3 days.
Please don’t guess, because I already know 30 options of what could happen.

[Guest]

Since no one was able to suggest anything, I had to pull out the car, remove the pan, look for the source of the sound (three-way valve), remove it, look at it with a smart look, put it back in place (after easy maintenance) and the problem went away. Thanks to Ariston for the easily removable tray, otherwise it can be tough, but not disassembled.

[Michael]

Thank you for writing what is the cause of this noise.