BoilerFaultCodesWorcester Bosch 200 Fault Code
The Worcester Bosch 200 fault code means: your boiler is not currently experiencing a fault; it is simply indicating that it is actively running to provide central heating for your home.. It appears on 20 Worcester Bosch models in our database.
Technical description: Boiler in heating mode
What causes the Worcester Bosch 200 fault?
This is a normal operational status message and not a mechanical failure. It appears when the boiler's internal controls detect a demand for warmth from your thermostat and ignite the burner to circulate hot water to your radiators. You will see this code whenever your heating is functioning exactly as intended.
This code is most frequently seen during autumn and winter when homeowners activate their heating systems for the first time or during cold spells.
DIY fix possible
Check your thermostat to ensure the target temperature is set correctly.Wait for the house to reach temperature; the code will change once the heating demand is met.No action is required as this is an operational status code, not an error.
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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 24 RSF manual (PDF)
- Worcester Bosch 24/28/35 CDi MkII manual (PDF)
- Worcester Bosch 26 CDi Xtra manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026