STANDBY NEON Low

Halstead STANDBY NEON Fault Code

Also written as STANDBYNEON — same fault.

The Halstead STANDBY NEON fault code means: your boiler is perfectly fine and is simply waiting for you to turn on a tap or adjust your heating thermostat.. It appears on 1 Halstead model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Neon light indicating the appliance is connected to power but not in active demand.

DIY fix possible

Check your room thermostat is set higher than the current room temperatureEnsure your heating timer or programmer is set to 'on'Run a hot water tap to see if the boiler fires up

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Halstead models that show the STANDBY NEON fault code

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

Source

Halstead STANDBY NEON 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