Low
GREEN LED Flashing 8-times a second on Vokera Sabre 25 HE Plus

Your boiler has entered an automatic mode where it is adjusting its internal temperature settings to operate more efficiently.

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

SARA function active

From this model's manual
Verified against the Vokera Sabre 25 He Plus 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

No action is required; this is a normal operational status.The flashing will stop automatically once the assessment period ends.Ensure your heating controls are set to your preferred temperature.

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