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

Typical repair cost for the Biasi Lock-out signal lamp OFF fault is £120-350 including labour.

Lock-out signal lamp OFF High

Biasi Lock-out signal lamp OFF Fault Code

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

Your boiler is failing to start up for central heating even though no warning lights are showing, meaning the ignition sequence is failing at various stages.

Also written as LOCKOUTSIGNALLAMPOFF — same fault.

The Biasi Lock-out signal lamp OFF fault code means: your boiler is failing to start up for central heating even though no warning lights are showing, meaning the ignition sequence is failing at various stages.. It appears on 1 Biasi model in our database.

Technical description: The burner doesn't light in c.h. mode. Fan still. The burner doesn't light in c.h. mode. Fan turns. The burner doesn't light in c.h. mode. Fan doesn't turn.

Typical repair cost £120-350 (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 OFF fault code

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

Riva Compact 24S Repair: £120-350

Source

Biasi Lock-out signal lamp OFF 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