Your boiler is working normally and the burner is currently lit to provide heating or hot water.
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: Green neon illuminated - Burner is operating
What causes this fault?
This is not a fault, but rather a status indicator showing that the gas burner is physically firing. It occurs whenever there is a demand for heat, such as when you turn up your thermostat or open a hot water tap. The green light confirms that the boiler's internal sequence has successfully ignited the gas to begin heating the water in the system.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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 Burner On — no call-out fees, no surprises.
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Potterton Performa 24 is discontinued — time for a new one?
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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