BoilerFaultCodesTechnical description
No lights at all
What causes this fault?
This fault occurs when the boiler's control system is no longer receiving the electrical current it needs to operate. The most common reason is a blown internal glass fuse or a failure within the main circuit board, often triggered by a sudden power surge or water leaking onto electrical components. Effectively, the boiler has lost its 'brain' and cannot communicate with any other parts of the system.
This issue often occurs during the first cold snap of autumn when older electrical components are placed under sudden stress after being idle over the summer.
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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