Your boiler is receiving power and is currently switched on at the mains supply.
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: Mains electricity ON.
What causes this fault?
This is not actually a fault, but a status indicator showing that your boiler has a healthy connection to the electrical mains. It typically appears when the power is first turned on or when the boiler is in a standby state ready to receive a command for heat. You do not need to take any action as your heating system is functioning exactly as it should.
DIY fix possible
No action is required as this is a status indicator rather than a fault.If the boiler is not firing, check that your thermostat is calling for heat.Ensure the boiler control knob is set to the 'On' or 'Auto' position.
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