LUCCA A53 Mini / Mini Vivaldi: Cleaning Fill Probe and Sealing Boiler Connection

A dirty fill probe can cause your espresso machine's steam boiler to over fill and leak excess water — follow these steps to remove and clean the fill probe on your Lucca A53. (Difficulty ☕☕)

Before proceeding with this procedure, it's important to drain the boilers and allow the machine to fully cool. Always unplug the machine from its power source before disassembling.

Tools required:

• Phillips screw driver
• 19mm socket wrench
• adjustable wrench
• metal brush / cleaning tool
• If needed, a new Fill Probe

1. Remove the top panel

2. Once the top panel is removed:

Re-install the fill probe, making sure that it's pressed down as far as it will go.

If you need to remove the whole fill probe assembly from the boiler to seal the threads, follow these steps after removing the fill probe from the base fitting as shown above:

Reassemble the machine in the reverse order you repaired it and test it for a leak when the machine is heating the steam boiler.

Don't forget to drain the steam boiler before testing the machine!