BoilerFaultCodesWorcester Bosch 2.2 Fault Code
Also written as 22 — same fault.
The Worcester Bosch 2.2 fault code means: your boiler is struggling to circulate water properly because it cannot communicate correctly with its internal water pump.. It appears on 1 Worcester Bosch model in our database.
Technical description: Service Function: Pump control mode
What causes the Worcester Bosch 2.2 fault?
This code appears when the boiler has been manually put into a specific service setting by an engineer, which changes how the internal pump operates. It is caused by an installer navigating the diagnostic menu and leaving the pump control function active rather than returning it to the standard automatic setting. Because this is a configuration setting rather than a broken component, the boiler is simply waiting for a command to return to normal operation.
DIY fix possible
Locate the 'Service' or 'Wrench' button on the control panelPress and hold the service button until the display returns to the standard temperature outputTurn the power off and back on at the fused spur switch to reset the electronics
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Gas Safe Register →Worcester Bosch models that show the 2.2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2.2 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026