BoilerFaultCodesWhat the manual says
Manufacturer manualStatus code: product is working correctly (heating mode)
What causes this fault?
This code appears when the boiler’s internal controls have successfully triggered the burner to provide heat for your radiators. It is a normal status message indicating that the diagnostic system is monitoring a standard heating cycle. There is no physical fault; the boiler is simply confirming it is responding to your thermostat's request for warmth.
You will see this code much more frequently during the autumn and winter months when your central heating is scheduled to run regularly.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
Avoid the next call-out bill
A cover plan would handle faults like S.04: no call-out fees, no surprise bills.
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