No light indication High

Halstead No light indication Fault Code

Also written as NOLIGHTINDICATION — same fault.

The Halstead No light indication fault code means: your boiler has lost all power and is completely unresponsive, meaning it cannot provide heating or hot water until the electrical fault is resolved.. 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: Defective power supply
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 No light indication fault code

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

Source

Halstead No light indication 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