Neon L6 High

Halstead Neon L6 Fault Code

Also written as NEONL6 — same fault.

The Halstead Neon L6 fault code means: your boiler has stopped working because it failed to light the burners or keep them running, and it needs a manual reset to try again.. It appears on 1 Halstead 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: Flame failure occurred / Reset required
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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Halstead models that show the Neon L6 fault code

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

Source

Halstead Neon L6 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