BoilerFaultCodesYour boiler is receiving electrical power and is currently on standby or ready to operate.
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 electrical connection and is ready to heat your home. It occurs whenever the mains power switch is turned on and the system is waiting for a signal from your thermostat or timer to start the burner. If your house is cold while this is displayed, the issue likely lies with your external heating controls rather than the boiler itself.
DIY fix possible
Check that your external thermostat or programmer is calling for heatEnsure the boiler thermostat knob is turned to the desired temperature settingVerify that any external pumps or motorised valves are functioning correctly
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Neon I3 — no call-out fees, no surprises.
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Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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