Unfortunately, our Nivona is causing problems again. There's no more coffee flowing out. She grinds and starts normally but the coffee doesn't come out in front. My wife thinks he's running inside the bowl, but we're not quite sure about that. The machine is about 5 years old and runs on 2/3 of the days in the year for 1 - 2 cups of cappuccino. So relatively little use. Half a year ago the outlet valve I-Form 2 bar Thermoblock - Nivona CafeRomatica 8xx was defective. Since I didn't think of it at first, the machine was decalcified very intensively several times. Also since then again and again regularly. Even with the right decalcifier based on amidosulfonic acid, decalcification is achieved.
I blew through the brewing group. It's continuous. If I follow the water flow correctly, then the water from the pump goes into the heater and then into the brewing group. There's nothing there to be, is there? But must it be.
Anyone have any idea what that might be?

--------------------
Nivona 850

Hello, bypass the door contact switches with a strip of cardboard and look at where the water or coffee is running out of the door.

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

First of all many thanks for the answer!
I tried it myself today. Unfortunately the process had to be aborted. Somehow the machine smelled something and nothing came out in front and it did not finish the coffee run. If then something came out uncontrolled behind left next to the grape marc cup. When I then switched off the machine and repositioned myself to get the brewing unit out again, coffee came out of the spout on the front left, but I can't tell where it came from.
I looked at the brewing unit again. The water comes in at the bottom and pushes it into the cylinder, right? At the top comes the sieve and above is the spout. When I blow into the upper tube, an "air" hole comes out at the top. If I shut that, she wouldn't have to come out to the screen support?
In other forums I read something about the drainage valve. I also removed, dismantled, cleaned and reinstalled it. Unfortunately without success.

--------------------
Nivona 850

Merry christmas, when coffee leaves the top of the brewing unit, it has to be dismantled, it could be that it is torn somewhere, please ask for detailed photos.

MfG Chris

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

Hello,

I bring out this but old post times, because I just have the same problem with my Nivona 767.
A few days ago it began that we had problems with milk drinks. When getting milk foam, it splashed a lot and there was maybe half of the milk foam in the end.
And as of this morning, no coffee is coming out the front. It ends up similar to the thread creator in the drip tray and sometimes runs alongside it, so it runs out of the machine. The fault with the milk froth seems highly likely to be the outlet valve, based on my research so far. Since I already know the error that no coffee comes out at the front of the outlet, I have ordered in addition to the outlet valve equal to a drainage valve. Is now already the 3rd. When I took the machine apart, I just tried to make sure that the hoses were not clogged. Reingepustet and as with the thread creator comes out above through a hole the air. No idea if that is "normal".

Photos of the disassembled brewing unit I try to provide.

Thanks for your helpGrußOliver

Ok, have the brewing unit apart and created photos.
Just no idea how I can upload them here.

I'll try to describe it with words.
After I have removed the brewing unit, I have first removed the filter plate, the hose and the seals and cleaned. I noticed a small hole in the unit, which is sealed by a piston. This was clogged with coffee powder. I cleaned it and noticed that this piston is spring-loaded. When I push that back, the air comes out of there and not up. I guess at that moment it seals at the top and opens at the bottom. So seems to be ok so far. I didn't dare to disassemble this piston as the screws are very corroded and I don't have any suitable replacement screws here.
I ran water through it from both directions with the piston pushed back. Is all clear and residue from coffee powder or similar did not come out.
Question about this, is this the crema valve?
Does that fit the error pattern described?

Thanks