Melitta Caffeo CI 970-101 - Drainageventil

Hello everyone,

I have the following problem, for a tip I would be very grateful.

I have replaced the drainage valve and after assembly the following happened:

1te cup of coffee 150 ml - ran everything super
2te cup of coffee 150ml => here only 100ml came out
3te cup of coffee 150ml => No more coffee at all front everything in the containers

Can someone tell me what I should do next?

Many greetings and thanks!

In the drip tray or in the set container?
You can remove the cover on the drip tray and then look where the water is coming from.

Have now looked at the tip was good.

So I lose under the brewing unit clear water and the coffee then comes over the black part in the drip tray.

That is I have the coffee in the drip tray
and
in the set container the set with some clear water.

Is the brewing unit then broken?

Many greetings and many thanks

Which black part do you mean? Expansion tank?
What does the lip seal on the brewing unit (piston) look like?

I made a short video - here is the sequence:

https://player.vimeo.com/video/817250409?h=9a1a85aaef


Video

There is something wrong with the brewing unit. Would they times disassemble and install new lip seal. Think that has a damage.
The black cover on top of the brewing unit is only clipped. The times take off and look closely at the black lip seal if there is something missing.

Has this problem been solved? I, for one, am having the same problem.