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Jura C70: Pump hums despite new spare parts

Repair, troubleshooting


March 25, 2021 06:25 pm


Coffee drinker

Group: Mitglieder

Posts: 1

Member No.: 43253

Joined: March 25, 2021


i inherited an "old" c70 that wouldn't run.

When you wanted to draw PFLEGE or a coffee, it always sounded as if the machine was clogged (built up pressure and then nothing came).
I then looked at the water flow diagram and noticed the following:
- if I disconnected the incoming hose to the outlet valve and pressed CARE, water came without a problem.
- when I disconnected the outgoing hose to the drain valve and pressed CARE, the machine started humming again, as if there was too much resistance in the system.
I then replaced the outlet valve.
Problem still persists.
Disassembled and serviced the entire brew group.
Problem remains.

Feeling that the machine could not build enough pressure, I then bought a new pump and replaced it.
Problem remains.

Where could the problem be? Electronics? Do I need to buy a new performance print?


March 25, 2021 08:34 pm


Coffee lover

Group: Mitglieder

Posts: 92

Member No.: 30026

Joined: February 18, 2017

Somewhere is clogged. May be that is in the hose lime or something else.