High
C7 217 on Worcester Bosch Greenstar 12i System

Your boiler has detected that it cannot move air through its internal system effectively, which has caused it to shut down for your safety.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

No airflow after a defined period of time - Fan not running or airflow blocked

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

EA 227View →E9 224View →

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