BoilerFaultCodesWorcester Bosch Fault 29 202 Fault Code
Also written as FAULT29202 — same fault.
The Worcester Bosch Fault 29 202 fault code means: your boiler is having trouble 'talking' to its internal controls or external thermostat, meaning it cannot receive the correct instructions to heat your home.. It appears on 2 Worcester Bosch models in our database.
Technical description: BUS device is configured but not available at present. System configuration: invalid circuit.
What causes the Worcester Bosch Fault 29 202 fault?
This fault occurs when the boiler's main control board loses its digital connection with the thermostat or internal communication components. It is often caused by a loose wiring connection inside the unit or a hardware failure in the wireless receiver that prevents signals from reaching the burner. Effectively, the boiler has been told a control device exists, but it can no longer find it on the network to receive instructions.
DIY fix possible
Turn the boiler power off at the fused spur switch for 30 seconds and turn it back on.Press and hold the 'Reset' button for five seconds.If you have a wireless thermostat, replace the batteries to ensure it is sending a strong signal to the boiler.
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Gas Safe Register →Worcester Bosch models that show the Fault 29 202 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch Fault 29 202 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