How much does it cost to fix Biasi error code 10 +?

Typical repair cost for the Biasi 10 + fault is £150-£350 including labour.

10 + Emergency

Biasi 10 + Fault Code

Q: What does the Biasi 10 + fault code mean?

Your boiler has shut down because it detected that the exhaust gases are getting too hot, which is a safety feature to prevent damage or dangerous fumes.

Also written as 10 — same fault.

The Biasi 10 + fault code means: your boiler has shut down because it detected that the exhaust gases are getting too hot, which is a safety feature to prevent damage or dangerous fumes.. It appears on 4 Biasi models in our database.

Technical description: Lockout due to tripping of the flue gas probe and thermal fuse.

Typical repair cost £150-£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 10 + fault code

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

Source

Biasi 10 + 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