E01 Emergency

Worcester Bosch E01 Fault Code

The Worcester Bosch E01 fault code means: your boiler has detected a problem with its internal ignition process and has shut down for safety to prevent a gas build-up.. It appears on 3 Worcester Bosch models in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: No technical description available in the provided text; only listed as 'Built-in fault finding diagnostics' as a feature.
Typical repair cost £150-300 (including labour)

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 E01 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch E01 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