How much does it cost to fix Biasi error code Wrench symbol?

Typical repair cost for the Biasi Wrench symbol fault is £80-£120 including labour.

Wrench symbol Low

Biasi Wrench symbol Fault Code

Q: What does the Biasi Wrench symbol fault code mean?

Your boiler is notifying you that it is due for its routine annual service to keep it running safely and efficiently.

Also written as WRENCHSYMBOL — same fault.

The Biasi Wrench symbol fault code means: your boiler is notifying you that it is due for its routine annual service to keep it running safely and efficiently.. It appears on 2 Biasi models in our database.

Technical description: Maintenance required.

Typical repair cost £80-£120 (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 Wrench symbol fault code

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

Source

Biasi Wrench symbol 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