BoilerFaultCodesTechnical description
Internal control error
What causes this fault?
This fault occurs when the boiler's internal computer chips fail to talk to each other correctly or lose programmed data. It is usually caused by a physical hardware failure within the main control board or a sudden electrical surge that has corrupted the system's memory.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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