SMS40D02RU/34 Noise during main wash ⇐ Bosch

[nikita]

Friends, help me deal with my paranoia. The problem is this: there is said dishwasher. Purchased in May 2015. Works like a charm, the dishes are clean and I can’t complain about their dryness. But there is a noise problem:
When the main pump starts, there is a noise (like a blender, only much quieter), the noise lasts about 10 seconds. Then the noise disappears and appears only in the middle of the main washing and drying cycle (when powder or rinse aid is added , as I assume).
The duration is different for different programs, but it is always there when the pump starts and in the middle of drying. In the middle of washing on different programs, the duration of the noise and its strength are different. Most of all, it is annoying in ECO 50 mode.
Yesterday, paranoia reached its limit and I took to the Internet to look for the cause. I didn’t find anything about Bosch, but I found about Ariston and Indesit. They even say in the instructions that the reason for this type of noise is excessive foaming. It turns out that with a large amount of foam, it gets into the pump, and it makes such sounds.

During the day the noise is not particularly annoying, but at night it can be heard in all rooms. I use separate detergents (manufacturers are all different, which are available in the store): powder, rinse aid and salt.
Question: has anyone encountered such problems? And is the problem really in the foam?
It’s just that the warranty expires in May, if the problem is in the pump, I would like to replace it under warranty (although it washes flawlessly)

[Chuk]

but at night it can be heard in all rooms

I also have a Bosch (model SMS50E02RU), and the pump is also noisy (when starting programs exactly), but not so much that all rooms can hear it. If you’re in the kitchen, you can hear it. But in other rooms there is no.
PS I use the cheapest powder from Auchan (~120 rubles\kg), without salt and rinse aid. Cleans very well.

[Chuk]

I forgot to write - the noise is similar to a loud growl with elements of a rattle.

[nikita]

That’s right, with ratchet elements. I guess I’m just listening

[I came to Didenko]

Well, did the author solve the noise problem? I have the same problem, also a grinding and rattling sound, I wanted to know if you managed to overcome the noise? Foam has nothing to do with it, since it makes noise even in ordinary water.

[nikita]

No. Didn’t solve the problem. I gave up on it, I’m using it like this for now. The noise when the pump starts and only when rinsing remains. I blame either the defect or the upper rocker. I tried it without it, no noise.

[777]

There was a crackling noise when filling with water (with any program), the dishwasher was in use for 4 months. I contacted the service department and they told me to wash the sprinklers. I washed it, nothing changed. They will send a technician. They strictly warned that if this can be fixed themselves, then the call must be paid for. How else can you try to eliminate the noise?...