C1 264 High

Worcester Bosch C1 264 Fault Code

Also written as C1264 — same fault.

The Worcester Bosch C1 264 fault code means: your boiler has detected that the internal fan responsible for venting exhaust gases has stopped working, so it has safely shut itself down to prevent any unsafe operation.. It appears on 4 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: Airflow stopped during operation Fan has stopped.
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 C1 264 fault code

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

Source

Worcester Bosch C1 264 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 7 July 2026