BoilerFaultCodesTechnical description
Programmer input
What causes this fault?
This fault happens when the boiler's main control board loses touch with the plug-in timer or external programmer responsible for scheduling your heating. It is usually caused by a loose connection in the internal wiring or a mechanical failure within the clock component itself, meaning the boiler doesn't receive the 'on' signal it expects. While the boiler's hardware might be fine, it stays idle because it can no longer see your heating schedule.
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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