BoilerFaultCodesWhat the manual says
Manufacturer manualBurner ignited (warm start)
What causes this fault?
This code appears when the boiler's internal pre-heat function activates to ensure hot water is delivered quickly to your taps or radiators. It is a natural part of the boiler's operating cycle where the burner ignites briefly to maintain a set temperature within the heat exchanger. Think of it as a standby mode rather than a malfunction.
DIY fix possible
No action is required as this is a normal status message.If you wish to stop this occurring, you can turn off the 'warm start' or 'pre-heat' function on the front control dial.Check that your external thermostat is calling for heat if the boiler stays in this mode for a long time.
Avoid the next call-out bill
A cover plan would handle faults like S.24: no call-out fees, no surprise bills.
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