BoilerFaultCodesWorcester Bosch EE2 Fault Code
The Worcester Bosch EE2 fault code means: your boiler has detected that a temperature sensor is giving readings outside of its normal bounds, causing the system to shut down as a precaution.. It appears on 1 Worcester Bosch model in our database.
Technical description: Sensor temperature limitations
What causes the Worcester Bosch EE2 fault?
This fault occurs when the main control board receives a signal from a temperature sensor that is far beyond the expected range, suggesting the component has failed or its connection is broken. It is usually caused by an internal short-circuit in the sensor or a loose wire in the harness that prevents the boiler from accurately monitoring heat levels. As a safety measure, the system stops firing to prevent potential overheating or damage to the heat exchanger.
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 EE2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch EE2 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