BoilerFaultCodesWhat the manual says
Manufacturer manualfan overrun
From this model's manual
Verified against the Glow Worm Flexicom Cx installation & service manual, page 45.
What causes this fault?
This code appears when the fan continues to run for a short period after the burner has switched off. It is a standard safety feature designed to purge the combustion chamber and flue of any remaining waste gases. The boiler has not malfunctioned; it is simply cooling down and clearing out the system before entering standby mode.
DIY fix possible
Wait for 5 to 10 minutes to see if the status code clears itselfCheck that there are no obstructions blocking the external flue pipe outside your homeIf the code stays on for hours without the boiler firing, try a simple reset
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