GREEN LED FLASHING Low

Halstead GREEN LED FLASHING Fault Code

Also written as GREENLEDFLASHING — same fault.

The Halstead GREEN LED FLASHING fault code means: your boiler is perfectly healthy and is simply waiting for a signal from your thermostat or hot water tap to start heating.. 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 in standby mode (Power on)

DIY fix possible

Turn up your room thermostat to a temperature higher than the current room temperature.Ensure your heating timer or programmer is set to 'On' for the current time.Check that you have not accidentally pressed the 'Off' or 'Summer' mode setting on your boiler controls.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Halstead models that show the GREEN LED FLASHING fault code

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

Source

Halstead GREEN LED FLASHING 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