Neon 6 High

Baxi Neon 6 Fault Code

Also written as NEON6 — same fault.

The Baxi Neon 6 fault code means: your boiler is struggling to clear exhaust gases properly, which has caused it to stop working to ensure your home stays safe.. It appears on 2 Baxi models 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: Fault on Fan or Flue
Typical repair cost £150-350 (including labour)

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 Neon 6 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Baxi Neon 6 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