BoilerFaultCodesWorcester Bosch 2940 Fault Code
The Worcester Bosch 2940 fault code means: your boiler has detected an internal communication error or hardware fault within its main control system, preventing it from firing up safely.. It appears on 8 Worcester Bosch models in our database.
Technical description: System fault burner control unit
What causes the Worcester Bosch 2940 fault?
This fault occurs when the boiler's internal computer and the burner control system stop talking to each other reliably. The most common reason is a electronic failure on the main circuit board or a loose connection in the internal wiring, which means the boiler can no longer safely regulate the flame.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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 2940 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2940 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