BoilerFaultCodesYour boiler's main internal computer has encountered a memory or communication error, preventing the system from running safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Boiler electr. system fault
What causes this fault?
This fault occurs when the boiler's internal processor or memory chip fails to communicate correctly with the rest of the system. It is usually caused by a hardware failure within the main control board or a sudden electrical surge that has corrupted the board's software. Because the boiler can no longer verify that it is operating safely, it will shut down immediately to prevent any damage.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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