BoilerFaultCodesYour boiler is not showing an error; it is simply displaying a status message to let you know that the burner is currently active and heating your 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: 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
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A boiler cover plan would cover faults like S.14 — no call-out fees, no surprises.
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