High
FAULT POINT A on Worcester Bosch Greenstar 15sbi

Your boiler has lost all power and is completely unresponsive to your heating controls, meaning it cannot provide heat or hot water.

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 lights at all with a system boiler demand and user control set to maximum

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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