215 / C6 High

Worcester Bosch 215 / C6 Fault Code

Also written as 215C6 — same fault.

The Worcester Bosch 215 / C6 fault code means: your boiler has detected that the internal exhaust fan is spinning faster than it should for safety reasons, so it has automatically shut down to prevent potential issues.. 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: Fan running too fast
Typical repair cost £200-350 (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 215 / C6 fault code

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

Source

Worcester Bosch 215 / C6 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