BoilerFaultCodesBiasi Lock-out state Fault Code
Also written as LOCKOUTSTATE — same fault.
The Biasi Lock-out state fault code means: your boiler has attempted to light itself four times without success and has turned itself off for safety.. It appears on 1 Biasi model in our database.
Technical description: The electronic control/ignition p.c.b. carries out four complete ignition cycles and then goes to lock-out state (e.g., if gas supply is interrupted).
DIY fix possible
Check if other gas appliances in your home, like a cooker, are working to confirm gas supply.Ensure your gas meter has credit and the emergency control valve is open.Press the reset button on the front control panel once to attempt a restart.
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Biasi models that show the Lock-out state fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Biasi Lock-out state fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026