High
A1 on Worcester Bosch Ri 25 HE

Your boiler has detected that the water pump is not moving water correctly, which often happens because there is air trapped in the system or the pressure is too low.

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

pump has run dry

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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