F-05 looks like a fault code. Unfortunately you decided it wasn't necessary to give anyone the remotest idea of what machine you are talking about.
All anyone can say is: There is probably a fault.
It MAY be that there is something stopping the drain pump. Perhaps something stuck in it. The manual should tell you how to check. It may be that the drain motor has failed or the controller has spat out its dummy.
We're only guessing really. We have no idea what you have.
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October 2017