Low
FAN NEON on Halstead Hero

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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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