BoilerFaultCodesYour boiler has no power and appears completely dead, which is usually caused by an electrical supply issue or a blown fuse.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No power, blown fuse, Internal fault (Ensure power supply to Boiler is on, check fuse, Contact engineer)
What causes this fault?
This fault occurs when the boiler's control system loses all electrical power, causing the entire unit to shut down. The most common reasons are a tripped circuit breaker, a blown fuse in the external wall switch, or a failure of the internal printed circuit board. Essentially, the 'brain' of the boiler has no electricity to communicate with the display or the heating components.
This issue is occasionally seen following summer thunderstorms, as power surges or lightning strikes can blow the delicate fuses or damage the circuit board.
DIY fix possible
Check if your home's main electrical consumer unit has trippedEnsure the boiler's isolation switch (fused spur) is turned onReplace the 3-amp fuse in the external boiler switchReset the boiler by turning the mode selector dial to 'Off/Reset' and back to 'On'
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