235 High

Worcester Bosch 235 Fault Code

The Worcester Bosch 235 fault code means: your boiler's internal computer is confused because its internal identification settings do not match the specific components installed, causing it to lock itself to prevent incorrect operation.. It appears on 13 Worcester Bosch models 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: Conflicting versions of boiler electr. and boiler identification
Typical repair cost £120-250 (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 235 fault code

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

Source

Worcester Bosch 235 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 31 August 2026