Worcester Bosch Greenstar 40 CDi Conventional Fault codes & diagnostics

3 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural GasLPG 2005-2014 Discontinued
GC Numbers 41-311-7241-311-74
Download the Worcester Bosch Greenstar 40 CDi Conventional manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Just want the most common Worcester Bosch Greenstar 40 CDi Conventional faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 documented codes

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