GREEN LED Flashing 8-times a second Low

Pro GREEN LED Flashing 8-times a second Fault Code

Also written as GREENLEDFLASHING8TIMESASECOND — same fault.

The Pro GREEN LED Flashing 8-times a second fault code means: your boiler is operating in a special automatic mode to adjust its efficiency and does not actually have a fault.. It appears on 1 Pro 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: AUTO function active
Typical repair cost £0 (including labour)

DIY fix possible

Check if the 'AUTO' button on the control panel is illuminatedPress the 'AUTO' button once to deactivate the mode if you prefer manual controlMonitor the display to ensure the flashing stops and returns to normal operation

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Pro models that show the GREEN LED Flashing 8-times a second fault code

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

Source

Pro GREEN LED Flashing 8-times a second fault code information on this page is sourced and cross-checked against the official Pro service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026