BoilerFaultCodesTechnical description
Flashes to indicate ignition operation (stops after detection)
What causes this fault?
This indicator is triggered when the boiler's control box sends a high-voltage spark to the burner to start the heating process. It is a normal function that occurs every time the boiler fires up and should disappear as soon as a flame is detected. If the light continues to flash without the boiler firing, it usually means the gas is not igniting or the sensor cannot see the flame.
DIY fix possible
Check that your gas supply is turned onEnsure your thermostat is calling for heatCheck if other gas appliances are working
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