BoilerFaultCodesBiasi Er10 Fault Code
Also written as ER10 — same fault.
The Biasi Er10 fault code means: your boiler has shut down because it has detected that the exhaust gases are becoming dangerously hot, which usually indicates a blockage or a heat exchange problem.. It appears on 2 Biasi models in our database.
Technical description: Lockout --- flue temperature probe NTC (Flue temperature > 120˚C)
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 Er10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Biasi Er10 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