No display High

Halstead No display Fault Code

Also written as NODISPLAY — same fault.

The Halstead No display fault code means: your boiler has no power and the screen is completely blank, meaning it cannot provide any heating or hot water until electrical flow is restored.. It appears on 3 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: No light indication - Defective power supply
Typical repair cost £100-£350 (including labour)

DIY fix possible

Check if other appliances or lights in your home are working to rule out a general power cut.Inspect your home's main consumer unit (fuse box) to see if a circuit breaker has tripped.Check the fused spur switch located next to your boiler; ensure it is turned on and try replacing the 3-amp fuse inside.

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Halstead models that show the No display fault code

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

Source

Halstead No display 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 31 August 2026