BoilerFaultCodesTechnical description
Boiler electr. system fault
What causes this fault?
This fault occurs when the boiler's internal computer parts stop talking to each other, similar to a crash on a home PC. It is usually caused by a hardware failure on the main circuit board or a loose connection in the internal wiring that prevents the boiler from sending safety signals. Because the system can no longer double-check its own safety sensors, it shuts down immediately to prevent any damage.
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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