One of the most common causes of slow or incomplete dispensing is coffee that has been ground too finely.

Very fine coffee can restrict the brewing chamber, causing the coffee to drip very slowly or stop completely.

If adjustment is required:

• Only adjust the grinder while it is running.
  
• Move the setting one click at a time.
  
• Test several coffees before making further adjustments.

Coffee oils gradually build up inside the brewing circuit.

Jura recommends running the automatic cleaning programme whenever the machine requests it, using genuine Jura cleaning tablets.

A blocked brewing system can reduce water flow and prevent normal coffee extraction.

If water flow has gradually reduced across all drinks, limescale may be restricting the thermoblock or hydraulic system.

If your Z5 is not operating with a CLARIS filter, complete the descaling programme when prompted.

Poor water flow often improves immediately after successful descaling.

The Z5 may appear to grind normally but still produce poor coffee if:

• Oily beans bridge together.
  
• Caramelised beans clog the grinder.
  
• The hopper is nearly empty.
  

Jura recommends using only roasted coffee beans without additives, as flavoured or caramelised beans can damage the grinder and affect brewing.

If the Z5 asks you to empty the drip tray or coffee grounds container, complete the instruction before attempting another coffee.

The machine monitors these components and will not continue brewing until they are correctly refitted.

Always empty the grounds container while the machine is switched on so the counter resets correctly.

If the grinder completes normally but no coffee reaches the cup, listen carefully.

Pump running loudly with little coffee

Usually indicates:

• Air trapped in the system.
  
• Heavy limescale.
  
• Restricted hydraulic circuit.
  

Pump sounds normal but only drips

Usually indicates:

• Coffee ground too finely.
  
• Brew unit contamination.
  
• Coffee outlet partially blocked.