How much does it cost to fix Biasi error code E01?

Typical repair cost for the Biasi E01 fault is £100-£350 including labour.

E01 High

Biasi E01 Fault Code

Q: What does the Biasi E01 fault code mean?

Your boiler has failed to light the flame, which means your heating and hot water will not work until the system is reset or the gas supply is restored.

The Biasi E01 fault code means: your boiler has failed to light the flame, which means your heating and hot water will not work until the system is reset or the gas supply is restored.. It appears on 12 Biasi models in our database.

Technical description: Ignition failure / low gas pressure

Typical repair cost £100-£350 (including labour)

DIY fix possible

Check that your gas emergency control valve is open and you have credit on your gas meter.Ensure other gas appliances in your home, like a hob, are working correctly.Press and hold the 'Reset' button for five seconds to see if the boiler restarts.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Biasi models that show the E01 fault code

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

Source

Biasi E01 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