BoilerFaultCodesTechnical description
burner on
What causes this fault?
This code appears when the boiler's internal computer has successfully ignited the burner to meet a demand for heat. It signifies that the gas valve has opened and a flame is present, confirming that the system is operating exactly as intended. There is no physical fault or blockage causing this display; it is simply the boiler communicating its current activity.
DIY fix possible
Check your thermostat to see if it is calling for heatMonitor the display to see if the code changes to '0' when demand endsNo action is required as this is normal operation
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