BoilerFaultCodesTechnical description
System fault boiler electronics / basic controller
What causes this fault?
This fault occurs when the boiler's main control board loses the ability to communicate with the internal software or the display screen unit. It is typically caused by a critical hardware failure within the electronics or a corrupted data link between the internal components. In most cases, the central processor has failed to perform its safety checks, forcing the system to shut down for protection.
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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