BoilerFaultCodesBiasi E01 Fault Code
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 9 Biasi models in our database.
Technical description: Ignition failure / low gas pressure
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.
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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.
- Biasi Advance 25C manual (PDF)
- Biasi Advance Plus 30S ErP manual (PDF)
- Biasi Basica Combi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026