Fault 02 / 205 High

Worcester Bosch Fault 02 / 205 Fault Code

Also written as FAULT02205 — same fault.

The Worcester Bosch Fault 02 / 205 fault code means: your boiler's internal memory has encountered a glitch, causing some of its important settings to reset themselves to the factory defaults.. It appears on 1 Worcester Bosch model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Internal fault: Some parameters reset to factory settings due to EEPROM problem. Some parameters reset to default.

What causes the Worcester Bosch Fault 02 / 205 fault?

This fault occurs when the boiler's internal memory chip, or EEPROM, fails to communicate correctly with the main control board. It is typically caused by a minor electrical surge or hardware degradation that corrupts the stored configuration data. As a result, the boiler loses its specific operating instructions and defaults to factory settings as a safety precaution.

Typical repair cost £250-£450 (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 Fault 02 / 205 fault code

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

Source

Worcester Bosch Fault 02 / 205 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