BoilerFaultCodesBaxi 24 Fault Code
The Baxi 24 fault code means: your boiler has detected an issue with the system that pushes air through the unit and expels gases safely outside, so it has shut down to prevent unsafe operation.. It appears on 8 Baxi models in our database.
Technical description: Fault on Fan or Flue
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 24 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 24 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