BoilerFaultCodesYour boiler has lost power or has a major electrical fault, meaning it cannot provide any heating or hot water despite the fuse board appearing normal.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No red lights (Green light functions)
What causes this fault?
This fault occurs when the boiler's internal brain loses the ability to distribute power to key components like the fan or pump. It is usually caused by a surge that has blown the internal glass fuses or a complete failure of the transformer on the main circuit board. Because the boiler cannot verify that its safety systems are powered, it shuts down entirely as a precaution.
This fault is often seen after summer thunderstorms or during winter power grid fluctuations, as electrical surges are the primary trigger for blowing the boiler's internal fuses.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like FAIL POINT C — no call-out fees, no surprises.
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Worcester Bosch 24/28CDi II RSF is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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