BoilerFaultCodesWhat the manual says
Manufacturer manualHeatingmode:Burnerignition
What causes this fault?
This code appears when the boiler is transitioning from a standby state to an active heating state. It signifies that the internal components are currently sparking the burner to create a flame, which is a necessary step to start warming your radiators. This is a standard part of the boiler's operation and not an indication of a mechanical failure.
This status is most frequently seen during autumn and winter when the heating system is first called upon to handle colder outdoor temperatures.
DIY fix possible
Check if your thermostat is calling for heatWait a few minutes to see if the status code changes to a running code (starting with 'S.04')Ensure your gas supply is active and credit is on the meter
Avoid the next call-out bill
A cover plan would handle faults like S.03: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.