BoilerFaultCodesYour boiler has stopped working to protect itself and needs a manual restart to clear a temporary error.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Lock-out signal lamp - If illuminated, indicates a fault requiring reset
What causes this fault?
This fault occurs when the boiler's internal computer detects a safety issue or a failed ignition sequence, causing it to shut down to prevent damage. The most common reasons include a lack of gas supply to the burner, a worn-out ignition spark, or a misunderstanding between the sensors and the main control board.
DIY fix possible
Locate the reset button on the boiler control panelPress and hold the reset button for several secondsWait for the boiler to complete its startup sequence and check if the lockout light goes out
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