Your boiler's internal computer has encountered a software or communication error and can no longer control the heating process.

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.