BoilerFaultCodesWhat the manual says
Manufacturer manualTemporary flame loss – this is a temporary error, the system should reset on its own
What causes this fault?
This fault occurs when the boiler's internal sensor fails to detect a consistent flame during operation, leading the system to stop as a safety precaution. The most common reasons include a worn-out sensing probe that can no longer 'see' the flame or a slight instability in the gas supply that prevents a steady burn. It is often a sign that the components responsible for lighting the gas or monitoring the fire are starting to fail.
DIY fix possible
Wait for the boiler to complete its automatic restart cycleCheck that other gas appliances in the home are working correctlyMonitor the boiler to see if the issue persists or clearsPress the reset button if the boiler enters a permanent lockout state
Avoid the next call-out bill
A cover plan would handle faults like 3 Green Flashes: no call-out fees, no surprise bills.
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