How much does it cost to fix Biasi error code Faulty gas valve?

Typical repair cost for the Biasi Faulty gas valve fault is £220-£380 including labour.

Faulty gas valve High

Biasi Faulty gas valve Fault Code

Q: What does the Biasi Faulty gas valve fault code mean?

Your boiler is unable to light the gas burner because it isn't receiving any fuel, likely due to a mechanical failure or an electrical communication issue with the gas control valve.

Also written as FAULTYGASVALVE — same fault.

The Biasi Faulty gas valve fault code means: your boiler is unable to light the gas burner because it isn't receiving any fuel, likely due to a mechanical failure or an electrical communication issue with the gas control valve.. It appears on 3 Biasi models in our database.

Technical description: Faulty on-off operators or not electrically supplied

Typical repair cost £220-£380 (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 gas valve fault code

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

Source

Biasi Faulty gas valve 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