BoilerFaultCodesWorcester Bosch 200 Fault Code
The Worcester Bosch 200 fault code means: your boiler is operating normally and is currently providing heat to your radiators.. It appears on 16 Worcester Bosch models in our database.
Technical description: The boiler is in heating mode
What causes the Worcester Bosch 200 fault?
This is not actually a fault, but rather a status code indicating that the boiler has received a request for warmth from your thermostat. It means the internal pump and burner are active and are successfully sending hot water to your radiators. You will see this code whenever the heating is running as intended.
This code is most frequently seen during the autumn and winter months when the central heating is programmed to run more often.
DIY fix possible
No action is required as this is an status indicator, not a fault.Check your thermostat settings if you did not expect the heating to be on.Monitor the display to ensure it changes when heating is no longer required.
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Worcester Bosch models that show the 200 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 200 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 35 RSF manual (PDF)
- Worcester Bosch GB162 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026