BoilerFaultCodesYour boiler is not receiving power, which means it cannot turn on to provide 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: Fault with mains supply or PCB fuse
What causes this fault?
This fault occurs when the boiler's control system is completely deprived of electrical power, often due to a blown internal fuse or a failure within the main circuit board. The most common reason is an electrical surge or a faulty internal component causing a short circuit, which trips the protection to prevent further damage.
DIY fix possible
Check if the boiler's fused spur switch is turned onCheck your home's main consumer unit (fuse box) to see if a circuit breaker has trippedReplace the 3-amp fuse in the boiler's external wall switch
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
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