New MacBook Air 11 inch, 2013, Kernal_task running 300% constantly

I have just purchased a brand new MacBook Air 11 inch, 2013.
I noticed that the fan was running constantly when I booted up and have tracked it through the activity monitor to the Kernal_task which is eating up 300% on the CPU. I have no thrid party software or apps installed. It's brand new out of the box and the only thing that has been done is install the Mavericks updates as instructed by the apple update software.
And yet the Kernal_task still runs at 300% and the fan grinds on constantly regardless?!?
Is there anyway to fix this? Or have I got a dud model. It seems to be very strange for a brand new Mac to be like this. The fan and the Kernal_task as chewing through the battery and making the whole point of purching this Macbook Air a bit pointless.
Is there anyway to kill the Kernal_task without bricking my Mac?
Cheers,
S

Take it back for replacement since it's in warranty.

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  • My new macbook air storage keep going down without doing anything.

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    Move your cursor up to the Apple menu and select About this Mac then select Storage from the options at the top of the dialog box that opens. This Spotlight view will show you how much of the drive is being used to store Applications, Files, Music, etc. Other is something of a catchall group so it doesn't really help.
    One explanation for the "missing" space is Backups. If you are using TimeMachine the computer will make backups to the internal drive whenever it isn't connected to the TimeMachine drive. This 'missing' space really isn't missing because if you really need it the computer will automatically delete the internal backups to free it up for you.
    Another explanation are cache files and system logs. Your programs and the operating system need to keep temporary files and they aren't always immediately deleted. Your browser(s) also create cache files which makes your internet surfing experience much faster for sites you frequently visit. These caches can be quite large.
    To delete/trim system and application caches you can restart your computer while holding the shift key. This is a safe boot and among other things it will delete/trim caches. Reboot normally once you get to the Finder. Also, remember to empty the trash can - putting stuff in the trash doesn't immediately delete it. If you use iPhoto you must manually delete its trash too.

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