BoilerFaultCodesYour boiler is not receiving any electricity, which means the display lights are off and the system cannot start.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Electrical Supply Fault
What causes this fault?
This fault occurs when the electrical circuit to the boiler is broken, preventing power from reaching the internal components. The most common reason is a blown fuse in the external spur switch or on the main control board, often caused by a sudden power surge or a failing internal part like the pump.
DIY fix possible
Check if other appliances in the house have power.Verify that the boiler's fused spur switch (usually located near the boiler) is turned on.Check your home's main consumer unit (fuse box) to see if a circuit breaker has tripped.
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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