Boiler lockout High

Ferroli Boiler lockout Fault Code

Also written as BOILERLOCKOUT — same fault.

The Ferroli Boiler lockout fault code means: your boiler has stopped working because it couldn't light the internal flame after several attempts, so it has purposefully locked itself for safety.. It appears on 4 Ferroli models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

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
Typical repair cost £120-250 (including labour)

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 27 April 2026