High
24 V fuse blown on Worcester Bosch Greenstar R29 40 HE

Your boiler has stopped working because an internal safety fuse has tripped to protect its electrical system from an unexpected power surge or short circuit.

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

24 V fuse blown. Replace fuse.

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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