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 →