La Marzocco
Brew Activation / Input Fault
Machine does not start a shot when brew button is pressed; no pump or valve activation.
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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
Faulty brew button or keypad, broken wiring from keypad to control board, failed group control board input, software lockout (e.g., cleaning mode)
How to Fix / Troubleshooting
Safety first: Turn OFF and unplug the machine before accessing the keypad or control boards.
Steps:
- Check for lockouts: Ensure the machine is not in programming or cleaning mode that disables brewing.
- Test other buttons: If other functions work, the specific brew button may be faulty.
- Inspect keypad connections: Remove the front panel and reseat the keypad or button harness connectors.
- Test button continuity: With a multimeter, verify that the brew button closes when pressed. Replace the keypad or switch if it does not.
- Check group board: If inputs are good but no response, the group control board may be defective and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Keypad / Brew Switch
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