BoilerFaultCodesTechnical description
Control unit is not fault manager
What causes this fault?
This fault occurs when the main brain of the boiler loses its ability to lead the communication between different internal electronic parts. It is usually caused by a physical break in the wiring connections or a software glitch within the circuit board that prevents it from acting as the 'central manager' for the system.
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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