BoilerFaultCodesBaxi A neon flashing Fault Code
Also written as ANEONFLASHING — same fault.
The Baxi A neon flashing fault code means: your boiler is struggling to light or cannot keep the flame burning, which has caused it to shut down for safety.. It appears on 2 Baxi models in our database.
Technical description: Ignition failure or burner extinguishes after 10 seconds; investigation required in sections I & N
DIY fix possible
Check that your gas pre-payment meter (if applicable) has credit.Verify that other gas appliances, like a cooker, are working to ensure gas supply exists.Reset the boiler by turning the selector switch to 'R' for at least five seconds and then back to the desire setting.
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Baxi models that show the A neon flashing fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi A neon flashing 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