Your Jura coffee machine uses a vibration pump to draw water from the tank through the flow meter, thermoblock and brewing system. If this process is interrupted, the machine may fail to pump water correctly, preventing coffee or hot water from being dispensed.

In many cases, the problem can be resolved with routine maintenance, particularly if the issue is caused by scale build-up or an airlock.

Your Jura machine may:

• Not dispense water.
  
• Produce no coffee.
  
• Dispense only a few drops.
  
• Buzz or vibrate without water flowing.
  
• Stop during brewing.
  
• Fail to dispense hot water.
  
• Display a water system or maintenance message.
  
• Sound louder than normal during brewing.

If the water tank has been allowed to run empty, air can enter the hydraulic system.

An airlock may prevent the pump from drawing water, even after the tank has been refilled.

Try:

• Refilling the water tank.
  
• Removing and refitting the tank.
  
• Running several hot water cycles to help remove trapped air.

A blocked or expired water filter can restrict water flow.

If your machine uses a filter:

• Check it is correctly installed.
  
• Replace it if it has reached the end of its service life.
  
• Prime the new filter if required.
  

A faulty filter can sometimes prevent water from entering the machine.

Scale is one of the most common causes of restricted water flow.

Limescale can affect:

• The thermoblock.
  
• Internal pipework.
  
• Valves.
  
• Flow meter.
  

Complete the recommended Jura descaling programme if the machine is due for maintenance.

Coffee residue, mineral deposits or debris can partially block the internal water circuit.

Symptoms include:

• Slow water flow.
  
• Intermittent pumping.
  
• Brewing stopping part way through.
  
• Reduced coffee volume.
  

Routine cleaning and descaling often improve water flow before permanent damage occurs.

The vibration pump generates the pressure needed for brewing.

If the pump has failed, you may notice:

• A loud buzzing sound.
  
• No water movement.
  
• No coffee production.
  
• Hot water also failing to dispense.
  

Pump replacement generally requires professional servicing.

The flow meter measures the amount of water passing through the machine.

If it fails, the machine may:

• Stop brewing unexpectedly.
  
• Display water-related faults.
  
• Fail to complete brewing cycles.
  
• Dispense incorrect drink volumes.

Many Jura machines use a ceramic valve to direct water to the correct brewing circuit.

If the valve becomes restricted or fails:

• Water may not reach the brew unit.
  
• Hot water functions may stop.
  
• Coffee preparation may fail.
  
• Water may divert into the drip tray.

A heavily contaminated brew unit can also restrict water flow.

Coffee oils and compacted residue may increase resistance within the brewing chamber, reducing the amount of water reaching the coffee.

Running the automatic cleaning programme helps maintain proper flow.

Regular maintenance helps maintain reliable water flow and protects the hydraulic system.

To reduce the risk of pumping faults:

• Replace water filters as recommended.
  
• Descale the machine whenever prompted.
  
• Run the automatic cleaning programme regularly.
  
• Avoid allowing the water tank to run completely empty.
  
• Use fresh, clean water.
  
• Empty and clean the water tank regularly.
  
• Keep the hydraulic system free from limescale and debris.
  

Routine maintenance helps protect the pump, valves and thermoblock while ensuring consistent brewing performance.

Regular maintenance helps maintain reliable water flow and protects the hydraulic system.

To reduce the risk of pumping faults:

• Replace water filters as recommended.
  
• Descale the machine whenever prompted.
  
• Run the automatic cleaning programme regularly.
  
• Avoid allowing the water tank to run completely empty.
  
• Use fresh, clean water.
  
• Empty and clean the water tank regularly.
  
• Keep the hydraulic system free from limescale and debris.
  

Routine maintenance helps protect the pump, valves and thermoblock while ensuring consistent brewing performance.

If your Jura coffee machine is still not pumping water after completing the recommended maintenance, explore our Jura troubleshooting guides, fault code library and maintenance advice for model-specific support. Whether your machine is producing no water, weak flow or stopping during brewing, My Coffee Machine® provides clear guidance to help identify the fault and determine whether routine maintenance or professional repair is required.