AIR FLOW DEVICE High

Worcester Bosch AIR FLOW DEVICE Fault Code

Also written as AIRFLOWDEVICE — same fault.

The Worcester Bosch AIR FLOW DEVICE fault code means: your boiler has detected an issue with the internal fan or the way it clears exhaust gases, so it has shut down to keep you safe.. 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: The appliance will enter a lockout condition in the event of an air flow fault. If the controls fail to detect the correct air flow through the appliance the electricity supply to the gas valve will be interrupted.
Typical repair cost £150-350 (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 AIR FLOW DEVICE fault code

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

Source

Worcester Bosch AIR FLOW DEVICE 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