La Marzocco Group Thermal Isolation / Circulation Issue

Group head is cold to the touch and brew water cools rapidly at the group, even though boiler is at temperature.

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.

Possible Causes

Blocked thermosiphon loop, airlock in group circuit, scaled group passages, failed group heater (if equipped)

Safety first: Turn OFF and unplug the machine. Allow components to cool before disassembly.

Steps:

Flush group: Run several long flushes to encourage circulation and remove airlocks.
Check for kinks or blockages: Inspect thermosiphon lines for kinks or restrictions. Clear any obstructions.
Descale group: If scale is suspected, perform a professional descaling of the group and thermosiphon circuit.
Check group heater: On models with heated groups, test the group heater element and replace if open.

Hard 4/5

Group Heater Cartridge

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