BoilerFaultCodesYour boiler's internal computer has encountered a critical electronic 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 failure - electronic
What causes this fault?
This fault occurs when the boiler's main control board suffers an internal hardware failure or a communication breakdown between its electronic components. It is often caused by a sudden electrical surge, moisture getting onto the circuitry, or simply the natural degradation of the solder joints over time. Because the 'brain' of the boiler can no longer safely monitor the system, it shuts down entirely as a protective measure.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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