BoilerFaultCodesBaxi Burner On Fault Code
Also written as BURNERON — same fault.
The Baxi Burner On fault code means: your boiler is signalling that it is trying to light, but it is encountering a blockage or electrical issue that prevents the fuel from flowing correctly.. It appears on 3 Baxi models in our database.
Technical description: Indicator light - Check burner pressure, main injector blockage, and mains solenoid continuity
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Baxi models that show the Burner On fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi Burner On fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026