How much does it cost to fix Biasi error code Lock-out state?

Typical repair cost for the Biasi Lock-out state fault is £100-350 including labour.

Lock-out state High

Biasi Lock-out state Fault Code

Q: What does the Biasi Lock-out state fault code mean?

Your boiler has attempted to light itself four times without success and has turned itself off for safety.

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 2 Biasi models 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).

Typical repair cost £100-350 (including labour)

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.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

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 27 April 2026