BoilerFaultCodesYour boiler's internal computer memory has encountered a critical error, causing the system to lock itself down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: EEPROM lockout
What causes this fault?
This fault occurs when the boiler's control board suffers a communication failure or data corruption within its internal memory chip. It is usually caused by an electrical surge, component aging, or moisture ingress affecting the delicate circuitry of the main PCB. Effectively, the boiler has 'forgotten' its essential operating instructions and shuts down because it can no longer guarantee safe operation.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Could it be time for a new boiler?
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