La Marzocco
Inaccurate Flow Measurement / Dosing
Volumetric dosing is inconsistent; shot volumes vary significantly from one pull to the next.
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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
Partially blocked flowmeter, air bubbles in brew circuit, unstable line pressure, worn pump causing pressure fluctuations
How to Fix / Troubleshooting
Safety first: Turn OFF and unplug the machine before removing any water fittings.
Steps:
- Bleed air: Run several manual flushes through the group to remove air from the brew circuit.
- Clean flowmeter: Remove and clean the flowmeter turbine and housing to ensure smooth rotation.
- Stabilize line pressure: Ensure the water supply pressure is stable and within spec. Install a regulator if necessary.
- Check pump condition: If pressure fluctuates during shots, the pump may be worn and should be replaced.
- Recalibrate doses: Use the machine’s programming mode to reprogram volumetric doses after hardware issues are resolved.
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Repair Difficulty
Medium
3/5
Required Part
Brew Flowmeter
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