BoilerFaultCodesYour boiler's main control board has encountered an internal electronic error and can no longer manage the system safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal fault (PCB)
What causes this fault?
This fault occurs when the boiler's central brain, the printed circuit board, suffers an internal memory or communication failure. It is typically caused by electrical components wearing out over time or damage from a sudden power surge in the home’s electrical supply.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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 E11 — 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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