High
A1 281 on Worcester Bosch 26 CDi Xtra

Your boiler's internal pump is unable to circulate water because it is either physically jammed or there is too much trapped air inside the system.

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 stuck or running with air in the system

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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