Siemens eq 6 series 300 no milk foam

Hello all,

Unfortunately I didn't find a solution to my problem in the search, so I'll try it via a new post.

My problem is as follows.
I have had no milk foam for some time now. It splashes around instead of flowing.
I have already replaced the milk nozzle. Ceramic valve replaced, lines checked for leaks, etc.
Now I'm at the end of my knowledge and hope that possibly here is still found a solution.

Hello, unfortunately I also have the same problem.
No milk foam...only air splashes.
Also everything exchanged.
Interesting thing is...with ceramic valves from the internet there is always different information on the sticker at the ceramic valve.
0,000bar, 0,0011bar, 0,002bar, 0,004bar.
Article number according to Siemens/Bosch is the same...12015639.

It seems that no one here is on the forum.
Too bad.