BoilerFaultCodesWorcester Bosch 202 Fault Code
The Worcester Bosch 202 fault code means: your boiler is temporarily resting to prevent it from turning on and off too frequently, which helps protect the internal components from unnecessary wear.. It appears on 24 Worcester Bosch models in our database.
Technical description: Boiler in anti-cycle mode
What causes the Worcester Bosch 202 fault?
This occurs when your boiler reaches its target temperature too quickly and enters a protective rest period to avoid 'short-cycling'. It usually happens because the heat produced by the boiler cannot be moved away fast enough, often due to radiators being turned off or a highly efficient home needing very little energy. The boiler stays off for a few minutes to protect its internal parts from the mechanical stress of constant restarting.
This is more common during the milder months of spring and autumn when your home requires only a small amount of heat to maintain its temperature.
DIY fix possible
Check that your room thermostat is set higher than the current room temperatureEnsure all radiator valves (TRVs) are turned open to allow heat to circulateWait up to 15 minutes for the anti-cycle timer to expire and the boiler to restart automatically
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the 202 fault code
Click a model for the full fault code list and model-specific repair notes.
- 1000
- 24 RSF
- 26 CDi Xtra
- 30i Junior Repair: £0-90
- 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
- Hideaway
- Junior 24i
- Junior 28i
Source
Worcester Bosch 202 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