High Lockout
E 28 on Vokera Hydra

Your boiler has stopped working because it cannot detect that the internal fan, which is essential for safely venting exhaust gases, is running.

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

No signal from fan

What causes this fault?

This fault occurs when the boiler's computer loses contact with the fan responsible for clearing exhaust gases. It is usually caused by a mechanical failure within the fan motor itself or a loose connection in the internal wiring. Because the boiler cannot confirm the fan is spinning safely, it shuts down immediately as a safety precaution.

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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Related fault codes

E29View →E30View →

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