BoilerFaultCodesYour boiler has shut down completely because its internal computer has lost power or suffered a serious electrical fault.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Appliance lockout and power failure
What causes this fault?
This fault occurs when the boiler's main control board loses its electrical connection or suffers a complete internal failure. It is often caused by a blown fuse, loose wiring, or a power surge that has damaged the electronic components. Without a stable power signal, the boiler's computer cannot manage the safety checks and must shut down for security.
DIY fix possible
Check if your home has had a power cut or if a fuse has tripped in your consumer unitEnsure the boiler's fused spur switch (usually nearby) is turned onPress the Reset button or turn the control knob to 'OFF/RESET' for 10 seconds, then back to the heater icon
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
A boiler cover plan would cover faults like E04 — no call-out fees, no surprises.
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Vokera Pinnacle 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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