Plugging in MacBook sends fans into full drive.

I've just upgraded MacBook Pro to the latest model. Ive noticed that on the new model when I plug my MacBook into the power socket the fans slowly start to speed up they take about 5-10 minutes to get to a really high and LOUD level. As soon as I pull the power cord out you hear the fans slowly start to slow then when plugged back in they speed up again. Is this normal?

I'm no expert, but it doesn't sound normal to me. Fans are supposed to sense heat and turn on when the computer starts getting too hot. If they turn on when you connect the power adaptor, especially if the computer has been off and is cold, I would suspect that there might be a problem with the temperature sensors or something like that. You might try running the Apple Hardware test and see if it shows anything.
But since you just upgraded, you should be under warranty and should be able to get this taken care of at no expense to yourself.
Good luck!

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