Power On LED Low

Halstead Power On LED Fault Code

Also written as POWERONLED — same fault.

The Halstead Power On LED fault code means: your boiler is operating normally and is currently set to provide hot water to your taps or shower.. It appears on 2 Halstead models 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: Illuminated when the electrical supply is on and the Hot Water position is selected on the Main Switch.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Halstead models that show the Power On LED fault code

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

Source

Halstead Power On LED 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