Green LED Flashing 8-times every second Low

Halstead Green LED Flashing 8-times every second Fault Code

Also written as GREENLEDFLASHING8TIMESEVERYSECOND — same fault.

The Halstead Green LED Flashing 8-times every second fault code means: your boiler has entered an automatic management mode to optimize the temperature of your heating system and is not currently reporting a hardware fault.. 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: SARA function
Typical repair cost £0 (including labour)

DIY fix possible

Wait 15-20 minutes for the boiler to complete its automatic temperature adjustment cycleCheck that your room thermostat is set to your desired temperatureEnsure the heating control knob on the boiler fascia is not being turned rapidly, which can trigger this mode

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Halstead models that show the Green LED Flashing 8-times every second fault code

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

Source

Halstead Green LED Flashing 8-times every second 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