BoilerFaultCodesFerroli Boiler lockout Fault Code
Also written as BOILERLOCKOUT — same fault.
The Ferroli Boiler lockout fault code means: your boiler has stopped working because it cannot light the flame after several attempts, meaning you currently have no heating or hot water.. It appears on 2 Ferroli models in our database.
Technical description: After a number of attempts at ignition, the electronic unit always shuts down the boiler. Check that the flue is clear and fitted correctly and that air has been vented from the pipes - polarity is correct. Check that the electrode is positioned correctly and free from corrosion deposits
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ferroli models that show the Boiler lockout fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli Boiler lockout fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026