BoilerFaultCodesWorcester Bosch Fault 14 / 119 Fault Code
Also written as FAULT14119 — same fault.
The Worcester Bosch Fault 14 / 119 fault code means: your boiler's internal computer is having trouble communicating with an external plug-in control or a hot water cylinder component.. It appears on 1 Worcester Bosch model in our database.
Technical description: System configuration: incompatible BUS device. IPM for cylinder must be set to identification 3 or higher.
What causes the Worcester Bosch Fault 14 / 119 fault?
This fault occurs when the boiler's main control board fails to communicate correctly with an external component, such as a hot water cylinder sensor or a plug-in timer. The most common reason is a configuration error where the electronic 'address' of a connected device is set incorrectly, causing the system to stop as a safety precaution. It can also be triggered by loose wiring or a failing control module that can no longer send clear signals to the central computer.
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 Fault 14 / 119 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch Fault 14 / 119 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