Low
Green LED illuminated on Halstead Finest Gold

Your boiler is working perfectly and is currently in standby mode, simply waiting for you to turn on a tap or adjust the heating.

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.

What the manual says

Manufacturer manual

Power ON. Boiler is in service. If no other LED’s are illuminated, the appliance is awaiting a demand for heating or hot water.

From this model's manual
Verified against the Halstead Finest Gold ISM installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check your room thermostat is set to a temperature higher than the current room temperatureTurn on a hot water tap to see if the boiler activatesVerify the boiler mode selector is set to the desired 'Heating and Hot Water' position

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Avoid the next call-out bill

A cover plan would handle faults like Green LED illuminated: no call-out fees, no surprise bills.

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