How much does it cost to fix Biasi error code Lock-out signal lamp ON?

Typical repair cost for the Biasi Lock-out signal lamp ON fault is £90-180 including labour.

Lock-out signal lamp ON High

Biasi Lock-out signal lamp ON Fault Code

Q: What does the Biasi Lock-out signal lamp ON fault code mean?

Your boiler is failing to detect the flame after lighting, causing it to shut down for safety purposes even though the gas is ignited.

Also written as LOCKOUTSIGNALLAMPON — same fault.

The Biasi Lock-out signal lamp ON fault code means: your boiler is failing to detect the flame after lighting, causing it to shut down for safety purposes even though the gas is ignited.. It appears on 1 Biasi model in our database.

Technical description: The burner doesn't light, the ignition sparks continue and the boiler locks. By pressing the reset push-button the boiler starts the ignition cycle. The burner lights, the ignition sparks continue and the boiler locks again.

Typical repair cost £90-180 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Biasi models that show the Lock-out signal lamp ON fault code

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

Riva Compact 24S Repair: £90-180

Source

Biasi Lock-out signal 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