BoilerFaultCodesWorcester Bosch 245 Fault Code
The Worcester Bosch 245 fault code means: your boiler’s internal computer has encountered a critical communication error and can no longer process instructions.. It appears on 8 Worcester Bosch models in our database.
Technical description: System fault boiler electronics / basic controller
What causes the Worcester Bosch 245 fault?
This fault occurs when the boiler's central control board suffers a hardware failure or a total breakdown in communication with its internal components. It is often caused by a sudden electrical surge that damages the sensitive microprocessors, or by moisture getting into the casing and short-circuiting the electronics. Essentially, the 'brain' of the boiler has stopped working, meaning it can no longer safely control the gas valve or ignition process.
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 245 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 245 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