BoilerFaultCodesYour boiler appears to have lost all electrical power, meaning it cannot start up or provide any heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No lights at all
What causes this fault?
This fault occurs when the boiler's control system is no longer receiving the electrical current it needs to operate. The most common reason is a blown internal glass fuse or a failure within the main circuit board, often triggered by a sudden power surge or water leaking onto electrical components. Effectively, the boiler has lost its 'brain' and cannot communicate with any other parts of the system.
This issue often occurs during the first cold snap of autumn when older electrical components are placed under sudden stress after being idle over the summer.
DIY fix possible
Check if other appliances in your home have powerEnsure the boiler's electrical isolation switch is turned onCheck your home's main fuse box (consumer unit) for any tripped circuit breakers
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like FAIL POINT A — 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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