BoilerFaultCodesWorcester Bosch 201 Fault Code
The Worcester Bosch 201 fault code means: your boiler is simply indicating that it is currently busy heating your hot water, which is a normal operating status rather than a breakdown.. It appears on 12 Worcester Bosch models in our database.
Technical description: The boiler is in domestic hot water (DHW) mode
DIY fix possible
Check if a hot water tap is turned on somewhere in the houseClose any open hot water taps to allow the boiler to return to heating modeVerify that the pre-heat function is not simply running a routine cycle
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Worcester Bosch models that show the 201 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 201 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch 26 CDi Xtra RSF manual (PDF)
- Worcester Bosch Greenstar 30i System Compact ErP manual (PDF)
- Worcester Bosch Greenstar Heatslave II manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026