How much does it cost to fix Biasi error code Er 01?

Typical repair cost for the Biasi Er 01 fault is £100-280 including labour.

Er 01 High

Biasi Er 01 Fault Code

Q: What does the Biasi Er 01 fault code mean?

Your boiler has tried to light several times but failed, so it has shut itself down for safety.

Also written as ER01 — same fault.

The Biasi Er 01 fault code means: your boiler has tried to light several times but failed, so it has shut itself down for safety.. It appears on 1 Biasi model in our database.

Technical description: Lack of burner ignition on safety lockout

Typical repair cost £100-280 (including labour)

DIY fix possible

Check if other gas appliances, like your hob, are working to ensure fuel is reaching the houseEnsure your gas meter hasn't run out of credit or been turned offPress and hold the 'Reset' button for five seconds to see if the boiler restarts

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Biasi models that show the Er 01 fault code

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

Advance 25C Repair: £100-280

Source

Biasi Er 01 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