BoilerFaultCodesYour boiler is operating normally and is currently in the process of heating your radiators.
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 ignited (heating operation)
What causes this fault?
This is not a fault, but a status message indicating that the boiler has successfully ignited the burner to provide heat to your radiators. It shows the system is responding correctly to a request for heating from your thermostat and is performing its standard internal checks during operation.
This code is most frequently seen during the autumn and winter months when the central heating is active and the boiler is working to maintain the temperature of your home.
DIY fix possible
No action required; this is a status code indicating normal operation.Ensure your thermostat is set to the desired temperature.Check that your radiator valves are open if you require more heat.
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A boiler cover plan would cover faults like S.4 — no call-out fees, no surprises.
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