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

Typical repair cost for the Biasi Lock-out signal lamp red (ON) fault is £120-250 including labour.

Lock-out signal lamp red (ON) High

Biasi Lock-out signal lamp red (ON) Fault Code

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

Your boiler is failing to detect the flame after lighting, causing it to shut down for safety even though the burner briefly ignites.

Also written as LOCKOUTSIGNALLAMPREDON — same fault.

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

Technical description: The burner doesn’t light up, the ignition sparks continue and the boiler blocks. Pressing the reset push-button the boiler starts the ignition cycle again. The burner lights up, the ignition sparks continue and the boiler blocks again.

Typical repair cost £120-250 (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 red (ON) fault code

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

Riva Compact HE M96a Repair: £120-250

Source

Biasi Lock-out signal lamp red (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