Jura Pump Cavitation / Restricted Inlet

Machine is very loud during pumping, with pulsing noise and vibration

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Air in water line, Clogged CLARIS filter, Kinked inlet hose from tank, Failing ULKA pump

How to Fix / Troubleshooting

Step 1 – Check water supply:

  • Ensure the water tank is full and properly seated.
  • Remove the CLARIS filter and test without it.

Step 2 – Bleed air from system:

  • Open the hot-water/steam tap (if present) and run water until a steady flow appears.

Step 3 – Inspect inlet path (advanced):

  • With the housing removed (unplug first), inspect the hose from the tank connector to the pump for kinks or blockages.

Step 4 – Replace pump if needed:

  • If the pump remains excessively noisy and flow is poor despite a clear inlet, replace the ULKA pump.
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Repair Difficulty

Medium 3/5

Required Part

ULKA Vibration Pump
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