BoilerFaultCodesWorcester Bosch 201 Fault Code
The Worcester Bosch 201 fault code means: your boiler is simply letting you know that it is currently busy heating up your tap water and is working as expected.. It appears on 24 Worcester Bosch models in our database.
Technical description: The boiler is in domestic hot water (DHW) mode
What causes the Worcester Bosch 201 fault?
This code appears when the boiler's internal sensors detect a demand for hot water from a tap or shower. It is a normal operational signal indicating that the burner is firing specifically to heat your water rather than your radiators. Once you turn the tap off, the code will disappear as the boiler returns to its standby or heating mode.
DIY fix possible
Check that your hot water taps are fully turned offOnce the tap is closed, wait a few moments for the code to disappear and the boiler to return to standby or heating modeIf the code stays on when all taps are off, you may have a dripping tap or a minor leak in the hot water pipework
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Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the 201 fault code
Click a model for the full fault code list and model-specific repair notes.
- 1000
- 24 RSF
- 26 CDi Xtra
- 30i Junior
- 35 RSF
- Danesmoor
- GB162
- Greenstar 12i System
- Greenstar 2000
- Greenstar 27CDi
- Greenstar 28CDi
- Greenstar 4000
- Greenstar 8000
- Greenstar 8000 Life
- Greenstar 8000 Life System
- Greenstar 8000 Life/Style
- Greenstar 8000 Style
- Greenstar CDi Compact
- Greenstar Heatslave II
- Greenstar i
- Heatslave Repair: £0-120
- Hideaway
- Junior 24i
- Junior 28i
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.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026