Rancilio Autofill Control Failure

Machine does not auto‑fill boiler; steam pressure drops and does not recover, but pump works for brewing.

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

Faulty boiler level probe, Stuck autofill solenoid valve, Autofill relay failure on control board, Broken wire in autofill circuit

Safety: Turn off, unplug, and allow the boiler to cool. Do not run the boiler dry.

Check level probe: Clean and descale the boiler level probe as described earlier.
Test autofill solenoid: Manually energize the autofill solenoid (if you are qualified) to confirm it opens. Replace if stuck or coil is open.
Inspect wiring: Verify continuity from the level probe and solenoid back to the control board.
Control board: If the board never activates the autofill despite low level, the autofill relay or logic may have failed; replace the board.

Hard 4/5

Autofill Solenoid Valve

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