spinnin vs turning vs rotating

[Daemon99]

Can some one please tell me if the following sentences sound natural?

1) The fan is rotating (this looks too formal to me)
2) The fan is spinning
3) The fan is turning

If none of them look natural, please suggest the correct usage.
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Jamie (K)]

Yes, they all sound fine. If you say, "The fan is rotating," you may or may not be having a technical discussion. It can be, but doesn't have to be, formal.

[Torsten]

Why not just say 'the fan is running'?

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[Jamie (K)]

You can say, "The fan was running, but the blades weren't turning." So running doesn't necessarily involve rotation.