BoilerFaultCodesYour boiler is currently blowing out leftover exhaust gases through the flue, which is a normal process that happens for a short time after you turn off your heating or hot water.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: fan overrun
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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