BoilerFaultCodesBiasi Er 11 Fault Code
Also written as ER11 — same fault.
The Biasi Er 11 fault code means: your boiler is failing to detect a flame, which means it cannot light safely to provide heating or hot water.. It appears on 1 Biasi model in our database.
Technical description: Flame detection error
DIY fix possible
Check if other gas appliances (like a hob) are working to ensure gas is reaching the property.Ensure your gas meter has credit if you use a pre-payment meter.Gently press the 'Reset' button on the front control panel to see if the boiler restarts.
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A cover plan would handle faults like Er 11: no call-out fees, no surprise bills.
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Biasi models that show the Er 11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Biasi Er 11 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 7 July 2026