BoilerFaultCodesWhat the manual says
Manufacturer manualpump / fan overrun
From this model's manual
Verified against the Glow Worm Ultracom 2 Sxi installation & service manual, page 55.
What causes this fault?
This occurs when the boiler has finished heating your home and needs to dissipate residual heat from the internal components to prevent overheating. The system keeps the pump or fan running for a few minutes to circulate water or air until the temperature drops to a safe level. It is a standard safety feature of the appliance rather than a mechanical failure.
DIY fix possible
No action is required as this is a normal operational status message.Wait a few minutes for the boiler to complete its cooling cycle.If the code never disappears after 15 minutes, try resetting the boiler once.
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