BoilerFaultCodesYour boiler has experienced an internal communication error or hardware failure within its control system, causing it to shut 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: Internal fault
What causes this fault?
This fault occurs when the boiler's internal computer system suffers a communication breakdown, meaning the various components can no longer talk to each other correctly. It is usually caused by a hardware failure within the main control board or damage to the connecting wires that carry signals throughout the unit. 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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