BoilerFaultCodesYour boiler appears to have no power reaching it, which is likely caused by an external electrical issue or a blown fuse inside the unit.
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 electrical circuit feeding the boiler is broken, meaning the unit cannot receive the power it needs to operate. The most common reason is a blown fuse within the boiler's internal control board or an issue with the external power switch on the wall. In some cases, a power surge or a failing internal component can cause the fuse to pop as a safety precaution to protect the sensitive electronics.
DIY fix possible
Check if your home's main fuse board (consumer unit) has tripped and flip the switch back if necessary.Locate the fused spur switch near the boiler (usually a wall switch with a red light) and ensure it is turned on.Check if other appliances in the house are working to rule out a general power cut.
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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