BoilerFaultCodesYour boiler's main internal computer has detected a technical error and has stopped working to protect the system.
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
What causes this fault?
This fault occurs when the boiler's main control board suffers an internal electronic failure or a communication error between its components. It is often caused by a power surge, moisture getting onto the circuitry, or simply the electrical components wearing out over time. Because the 'brain' of the boiler can no longer safely manage the heating process, it shuts the system down as a precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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