How much does it cost to fix Baxi error code Air Flow Monitor Neon?

Typical repair cost for the Baxi Air Flow Monitor Neon fault is £120-250 including labour.

Air Flow Monitor Neon Emergency

Baxi Air Flow Monitor Neon Fault Code

Q: What does the Baxi Air Flow Monitor Neon fault code mean?

Your boiler is struggling to breathe because the pipe that vents exhaust gases outside is blocked or faulty, meaning it cannot operate safely.

Also written as AIRFLOWMONITORNEON — same fault.

The Baxi Air Flow Monitor Neon fault code means: your boiler is struggling to breathe because the pipe that vents exhaust gases outside is blocked or faulty, meaning it cannot operate safely.. It appears on 1 Baxi model in our database.

Technical description: Indicates that the flue or flue terminal is blocked or obstructed in some way, or that there is an internal fault.

Typical repair cost £120-250 (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 Air Flow Monitor Neon fault code

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

System 35/60 / 60/100 Repair: £120-250

Source

Baxi Air Flow Monitor Neon 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