FAN NEON Low

Halstead FAN NEON Fault Code

Also written as FANNEON — same fault.

The Halstead FAN NEON fault code means: the indicator light is showing that your boiler's internal ventilation fan is active, which is a normal part of the startup and shutdown sequence.. It appears on 1 Halstead model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Neon light indicating fan operation status.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Halstead models that show the FAN NEON fault code

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

Source

Halstead FAN NEON fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026