What does the Worcester Bosch Lock-out fault code mean?

Your boiler has stopped working because it cannot detect a flame, likely due to a gas supply interruption.

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.

Check that your gas emergency control valve is in the 'on' position

The burner will go out but sparking from the electrode will continue for 10 seconds. This can occur if the gas supply is turned off during operation.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

Safety-critical — turn off, read this.