Melitta Caffeo CI with squeaking and permanent decalcification

moin moin from Flensburg!

I have the following problem with my Melitta Coffeo CI.

When I start my machine, the descaling mode starts immediately and quits when the coffee/milk gland is rinsed.
I have already read a few
things, but unfortunately I didn't
help
.
I have cleaned thoroughly, replaced the flowmeter and brewing unit (I have an identical part at home, perfect for testing the defective components) Drainage valve is also relatively new as I
had to replace
it due to
another defect.
In the following link you can watch a video to perhaps better
understand what I mean
: Paul's
quitschender KVAI
am grateful for every tip and as said can quickly
exchange
partsLG

Paul Paul

besser bei Youtube...

Looks like the steam waterway's jammed.
Possibly Kalkgries sits in the steam nozzle at the top of
the outlet slide

and prevents the

water flow. GreetingsBS

--------------------
Ich schaue hier nur noch ganz selten vorbei.
In verschiedenen anderen Foren bin ich mit
dem gleichen Nickname zu finden, falls mal
jemand Hilfe benötigt kann ich vielleicht dort
helfen.

I have disassembled everything in front into individual parts and got out a lot of coffee leftovers, it now runs more smoothly, but during the starting process he still goes into decalcification mode and at the third watercourse he starts again.
But it has to happen when I pull the water and then it still has to clog..I try to
clean
the inside of the tubes again
.
Open for further ideas

*****DISSOLVED***

thanks to your tips with the red hose! so
the front completely disassembled did not help at first, but I cleaned all cables on the inside to the Kermaikventil, while the Kermaikventil also immediately disassembled and cleaned. But I suspect that it was clogged in the red hose or the like, because the program got stuck while steaming and
made the noises.
Now everything runs noiseless and the coffee tastes a bit better than
usual ;-)
Thank you and have a nice Sunday evening!