No lightindication High

Halstead No lightindication Fault Code

Also written as NOLIGHTINDICATION — same fault.

The Halstead No lightindication fault code means: your boiler has lost all power, meaning it cannot produce heating or hot water because the electrical supply to the unit has failed.. It appears on 7 Halstead models 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 powersupply
Typical repair cost £100-£350 (including labour)

DIY fix possible

Check if other appliances in the house have powerInspect your main consumer unit (fuse box) to see if a circuit breaker has trippedCheck the fused spur switch near the boiler to ensure it is switched on

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Halstead models that show the No lightindication fault code

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

Source

Halstead No lightindication 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 27 April 2026