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.

Lock lamp on High

Biasi Lock lamp on Fault Code

Q: 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.

Also written as LOCKLAMPON — same fault.

The Biasi Lock lamp on fault code means: your boiler is failing to light the gas even though it is trying to spark, causing the system to shut down for safety.. It appears on 1 Biasi model in our database.

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

Typical repair cost £120-300 (including labour)

DIY fix possible

Check that your gas emergency control valve is in the 'on' positionVerify if other gas appliances in your home, such as a hob, are working correctlyPress and hold the reset button for 2-3 seconds to attempt a restart

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Biasi models that show the Lock lamp on fault code

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

Aquapiu 2002 Repair: £120-300

Source

Biasi Lock lamp on 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