BoilerFaultCodesWorcester Bosch 2926 Fault Code
The Worcester Bosch 2926 fault code means: your boiler's internal computer has detected a general electrical communication error and has shut down as a safety precaution.. It appears on 7 Worcester Bosch models in our database.
Technical description: Boiler electr. system fault
What causes the Worcester Bosch 2926 fault?
This fault occurs when the boiler's main control board loses the ability to talk to the internal sensors and components that manage the heating process. It is typically caused by a loose connection in the internal wiring or a critical failure within the printed circuit board itself, which prevents the boiler from safe operation.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Worcester Bosch models that show the 2926 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 2926 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