EA8245 Brewing piston pressed gives

On my Krups EA the brewing piston has been pushing itself upwards for a short time. Short review
:I
recently cleaned the grinder and reinstalled it. (Coffee couldn't be ground before) After the installation I only got a few drops of water from the coffee spout. So I simply changed the pump and the pressure valve.
After the installation I left the top open and noticed that the piston is
pressing upwards. The seals I also made new, but it did not bring any improvement.

Does anyone have an

idea? New piston or completely new unit incl. heating etc. would be my last options...

If you want to see the jmd, here are the rinse and coffee process on video
:https://drive.google.com/folderview
?

id=1qftwLLD0ry_AEs7aZWYQ1IMTArlKV4QDV


Thanks
a

lot


!
LG

The theme is "Brewing piston pushes up"

I know it from the EA9010 that it pushes the piston a little bit upwards.
With your machine, it's quite violent, so I suspect the brewing unit seals or the drain valve.

Thanks for the answer.
Mmm, I guess I'll have to
check
the drain valve and the spring
.

I'll rule out the gaskets, they're new.

Even the seals in the hydraulic block?

No, they're new to me. Thanks for the info. I have to take out the complete inner part to measure the diameter of the drainage valve anyway, then I will have a closer look.

Have exactly the same problem. Could anyone solve the problem? Would be really grateful for help.