Your boiler is currently trying to light the flame, which is a normal part of its startup sequence.
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: Flashes to indicate ignition operation (stops after detection).
What causes this fault?
This is a normal part of the boiler's operation and identifies that the system is currently trying to create a flame. It occurs every time your boiler starts up to provide heating or hot water, and the light should stop flashing as soon as the burner successfully lights. If the light flashes continuously without the boiler firing up, it may indicate a struggle to establish a stable gas supply or a spark.
DIY fix possible
Observe the light to see if it stops flashing once the boiler starts runningCheck that your gas supply is turned on if the light flashes for a long timeIf the boiler fails to light after several attempts, try pressing the reset button
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