BoilerFaultCodesTechnical description
burner on
What causes this fault?
This code appears when the boiler is functioning correctly and the internal burner has successfully lit to heat your home or hot water. It is triggered by a demand from your thermostat or a hot tap, signaling that the gas valve has opened and the ignition process is complete. There is no fault to fix as this is simply the boiler confirming it is currently burning fuel to provide heat.
DIY fix possible
No action is required as this is a normal operating status.Ensure your thermostat or hot water tap is calling for heat.Monitor the display to see if it changes to other normal status codes like S.04 or S.00.
Find a Gas Safe engineer
Search the official register →