BoilerFaultCodesTechnical description
fan overrun
What causes this fault?
This status occurs when the boiler's fan continues to run for an extended period after the burner has finished heating your home or water. It is usually caused by the main circuit board failing to tell the fan to stop, or the fan itself sending an incorrect signal back to the control system. While it often resolves itself, it can sometimes suggest the electronic components are beginning to wear out.
DIY fix possible
Observe the boiler to see if the fan eventually stops after several minutes.No action is usually required as this is often a normal operational status code.If the code persists indefinitely, try a simple reset of the boiler.
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