No display High

Halstead No display Fault Code

Also written as NODISPLAY — same fault.

The Halstead No display fault code means: your boiler is not reacting when you turn on the hot tap, leaving you with cold water and a blank display because it cannot sense that water is flowing.. It appears on 5 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 display when tap on. DHW cold. Defective DHW flow switch or defective DHW/CH thermistor
Typical repair cost £120-£240 (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 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 7 July 2026