How much does it cost to fix Biasi error code Faulty flame detection?

Typical repair cost for the Biasi Faulty flame detection fault is £120-220 including labour.

Faulty flame detection High

Biasi Faulty flame detection Fault Code

Q: What does the Biasi Faulty flame detection fault code mean?

Your boiler is struggling to detect if the burner has successfully lit, which has caused the system to shut down for safety.

Also written as FAULTYFLAMEDETECTION — same fault.

The Biasi Faulty flame detection fault code means: your boiler is struggling to detect if the burner has successfully lit, which has caused the system to shut down for safety.. It appears on 4 Biasi models in our database.

Technical description: Detection electrode, its wiring and connection issue that causes a lock state.

Typical repair cost £120-220 (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 Faulty flame detection fault code

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

Source

Biasi Faulty flame detection 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