High
NO LIGHTS AT ALL on Worcester Bosch 24i/28i Junior

Your boiler has lost all power and is completely unresponsive, meaning it cannot provide heating or hot water until the electrical supply is restored.

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 permanent live supply to control board, investigation of electrical supply from external system required, or control board fuse F1 blown.

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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