What does the Biasi Lock lamp on fault code mean?

Your boiler is failing to light the gas even though it is trying to spark, causing the system to shut down for safety.

How much does it cost to fix Biasi error code Lock lamp on?

Typical repair cost for the Biasi Lock lamp on fault is £120-300 including labour.

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

The boiler locks and the ignition sparks continue, it doesn't light on. Pressing the reset push-button the boiler starts the ignition cycle.

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.

7 signs repair isn't worth it anymore.