High Lockout
E14 on Vokera Pinnacle

Your boiler's electronic control board has experienced an internal failure, meaning the main computer cannot communicate with the rest of the system.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Internal fault (PCB)

What causes this fault?

This fault occurs when the boiler's main control board suffers a hardware failure, effectively becoming the 'brain' that can no longer process instructions. The most common reason is an electrical short-circuit or component degradation on the circuit board itself, which prevents the boiler from completing its safety checks.

This fault is more frequent following summer storms or during the first cold snap of winter, as power surges from lightning or heavy electrical demand can trip sensitive electronic components.

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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