How much does it cost to fix Worcester Bosch error code lock-out?

Typical repair cost for the Worcester Bosch lock-out fault is £120-250 including labour.

lock-out High

Worcester Bosch lock-out Fault Code

Q: What does the Worcester Bosch lock-out fault code mean?

Your boiler has failed to ignite after several attempts and has switched itself off for safety reasons, meaning it cannot currently provide heat or hot water.

Also written as LOCKOUT — same fault.

The Worcester Bosch lock-out fault code means: your boiler has failed to ignite after several attempts and has switched itself off for safety reasons, meaning it cannot currently provide heat or hot water.. It appears on 7 Worcester Bosch models in our database.

Technical description: The burner will go out but, after a short pause, the appliance will make 5 attempts to restart sparking for 5 seconds and then 'lock-out'. This occurs if the gas service cock is turned off or if the boiler fails to light after a maximum of 5 attempts.

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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Worcester Bosch models that show the lock-out fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch lock-out fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026