Jura Ena 5 coffee only drop by drop

Good day,

Since a few days the coffee comes out of the machine more and more sluggish. It comes the complete amount, but only drop by drop or a thin trickle. The machine sounds extremely tortured. Sometimes only a few milliliters come out on the first try and the brewing stops. After that, the machine asks to open the tap. There comes then very hot water intermittently, sometimes as steam. Only at the second brewing attempt comes then again drop by drop a complete coffee.

The water comes out of the hot water nozzle normally. I have descaled the machine twice, no improvement.

I plan to repair the machine myself. I have the know-how and tools.

Where should I start looking? How should I proceed? How do I find out which parts are defective?

Greetings, Wally

Sorry for the double post. I got a 504 gateway timeout on the first try. That's why I thought it didn't work. Maybe an admin can delete this thread.

Thanks
,Wally

What did you decalcify with?

With liquid descaler from dm and when that had not helped with tablets from Jura.

Take out the drip tray and long from the front inside up and clean times the sieve of the brewing unit with a Zewa. Maybe that's enough.

I have removed the brewing unit, disassembled, cleaned. Runs like the first day again. There was an insane amount of crud in it. I'll probably do that once a year now.

That's the better option, of course.