Power ON LED (Green) Low

Halstead Power ON LED (Green) Fault Code

Also written as POWERONLEDGREEN — same fault.

The Halstead Power ON LED (Green) fault code means: your boiler is working perfectly fine and is simply waiting for you to turn on a tap or adjust your heating settings.. 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: Boiler is in service. If no other LEDs are illuminated, the appliance is awaiting a demand for heating or hot water.

DIY fix possible

Check your room thermostat is set to a higher temperature than the current room temperature.Ensure the timer or programmer is set to 'On' or 'Timed'.Check that the hot water demand is active by opening a tap.

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Halstead models that show the Power ON LED (Green) fault code

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

Source

Halstead Power ON LED (Green) 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