Siemens EQ7 interrupts brewing process

Hello everyone!

My EQ7 does not give out coffee.
Everything runs through normally, until the moment when he should press water through the marc.
It then breaks off after a few seconds and it hisses at the end steam with proper pressure from the machine.
Here is a video:
https://youtube.com/shorts/4RIjFtUHZpk?feature=share

The whole thing occurred only very rarely, meanwhile I have the error as good as always.

The machine was decalcified x times and cleaned - it is not because of that.

I have already quite a lot researched...
As error source the following points are called mostly, which I have also worked off for the most part.

-Pump:
I have already completely disassembled and cleaned it - but there was nothing to clean... everything looked like new.

-Flowmeter:
I have also disassembled. Is clean and smooth.

-Ceramic valve:
This part I had in serious suspicion because the engine often ran very tormented. It sounded like the battery was empty
I disassembled everything, cleaned it and greased it again. Now it runs again in no time through all positions. Tested in the service menu without problems.

-temperature sensor:
Measured the resistance of the two sensors today.
The lower has about 8.6 Kohm - the upper has about 5.3 Kohm.
Shouldn't the values be identical?
Then reset the error messages (over 100 overheat entries).
Then tried to pull a coffee - of course it didn't work again - and there was another overheat error in the memory.

-brewing unit: Brewing unit:
Bought a brand new one - the error remains.

-Through-flow heater:
Measured the resistance of the heating elements: both have 44.6 ohms

Except for the exchange of the temperature sensors, I can think of nothing more.
Would be super nice if someone still has an idea.

Hello, with what was decalcified?
Disassemble pump, in most Simens/Bosch pumps you can only... do nothing. order new and install vibration dampers on the pump same order, as well as the flowmeter.
M.E the pump will experience their end of time.
Greetings Chris

--------------------
Alles ist Wiederverwertbar, sogar diese Buchstaben.
Keine Anfragen oder Hilfe, über E-Mail.