High
Fan Fault on Keston Combi2 C30

Your boiler has stopped working because the fan that removes waste gases is not spinning correctly, meaning the system has shut down for 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.

What the manual says

Manufacturer manual

Fault detected in fan operation. Checks: wiring connections between fan and PCB, wiring continuity, and 230 VAC supply to the fan.

From this model's manual
Verified against the Keston Combi2 C30 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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