BoilerFaultCodesWorcester Bosch 1076 Fault Code
The Worcester Bosch 1076 fault code means: your boiler has stopped working because it can no longer communicate with the sensor that monitors the temperature of the main heating unit.. It appears on 4 Worcester Bosch models in our database.
Technical description: Heat exchanger temp sensor disconnected
What causes the Worcester Bosch 1076 fault?
This fault occurs when the boiler's internal computer loses track of the heat exchanger's temperature, usually because the connection to the sensor has broken or the sensor itself has failed. Over time, the constant heating and cooling of the boiler can cause the wiring to become brittle or the sensor to degrade, preventing it from sending a clear signal. Without this safety information, the boiler shuts down immediately to prevent the unit from overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Worcester Bosch models that show the 1076 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch 1076 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
- Worcester Bosch Greenstar 2000 manual (PDF)
- Worcester Bosch Greenstar 27CDi manual (PDF)
- Worcester Bosch Greenstar 4000 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026