Fan Speed Increase To 6000rpm When Plugged In??

[Joko]

Hi

Here's the story:

I have a 17'' Macbook Pro Hi-Res 7200rpm, 2 months old.
I absolutely love it although one thing seems a bit strange.
Sometimes when it's plugged in it works fine the entire day where fans spin idle at 2000rpm and with intensive work max out at 3000rpm.
But sometimes the fans spin up to 6000rpm even when idle?
I know it's not a heat thing because it happens sometimes when completely cool too.
The fan speed comes right back down when I unplug.

So I'm thinking it could be one of the following:

1 - Temperamental charger?
2 - Faulty electrical source/power surges?

Any other suggestions? I don't want to install fan speed controllers because thats avoiding the issue. It never happens when it is unplugged.

Thanks in advance.

 

[richard.mac]

when the fans start to rev up open Activity Monitor in the Utilities folder, view all processes and sort by CPU load. quote the process which is taking up the most CPU load.

 

[Joko]

It happens even without any programs running. CPU levels at 1-2% only.

 

[richard.mac]

ok but there are processes other than your apps that can not respond causing the CPU load to increase and heat up causing the fans to rev.

try resetting the SMC http://docs.info.apple.com/article.html?artnum=303319

 

[Joko]

Thanks I did this after the tech guy at apple reset the ports and it hasn't happened since, hopefully it is fixed, holding thumbs! Thanks for the help.