BoilerFaultCodesBaxi 13 Fault Code
The Baxi 13 fault code means: your boiler is simply displaying how many hours the burner has been running as part of a routine status update, rather than indicating a fault.. It appears on 11 Baxi models in our database.
Technical description: alternates with Burner working hours
DIY fix possible
No action is required as this is an informational message.Wait for the display to cycle back to the temperature or current status.If the code stays locked and the boiler won't fire, try a simple reset.
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Baxi models that show the 13 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 13 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