Why is my fan so Loud?

[SPR1624]

I have a macbook 13". About 1.5 years old and the fan gets really loud sometimes. I know because it gets hot but it never used to be this loud. It's like I am listening to a helicopter fly by. My brother's Acer he bought for $300 is not as loud as my mac. (Not saying that it is a worse computer) Anyone know why?

Thanks

[angemon89]

Well, what are you doing when the fans start spinning faster? Tried restarting yet?

[SPR1624]

No. It eventually goes back down to normal but take a while ( 10 - 15 mins)

[angemon89]

Check Activity Monitor and see what programs may be using up a lot of CPU or a lot of memory and close them if you're not using them. Or if that doesn't work just restart it.

If you're watching a lot of youtube videos when it happens then that's pretty normal for MacBooks (flash for Macs sucks)

[SPR1624]

ok thanks!