A neon flashing High

Baxi 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 1 Baxi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Ignition failure or burner extinguishes after 10 seconds; investigation required in sections I & N
Typical repair cost £100-£250 (including labour)

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 27 April 2026