How much does it cost to fix Worcester Bosch error code F1 263?

Typical repair cost for the Worcester Bosch F1 263 fault is £250-450 including labour.

F1 263 High

Worcester Bosch F1 263 Fault Code

Q: What does the Worcester Bosch F1 263 fault code mean?

Your boiler has detected a critical failure in its internal electronic brain, meaning it has safely shut itself down and cannot operate until the hardware is repaired.

Also written as F1263 — same fault.

The Worcester Bosch F1 263 fault code means: your boiler has detected a critical failure in its internal electronic brain, meaning it has safely shut itself down and cannot operate until the hardware is repaired.. It appears on 11 Worcester Bosch models in our database.

Technical description: Control box or the HCM is defective.

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 F1 263 fault code

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

Source

Worcester Bosch F1 263 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