Laptop fan doesn't stop

Hello, running Debian Squeeze 6.0.3 amd64 on a DELL laptop and I have
a problem with the fan. When it boots up, the fan is really silent but
after a few of minutes it starts working and doesn't stop at all. I
didn't had this problem when I was running a debian based distro.(it
would start really slient, then work for a while, then go back silent
and so on).

Is there a fix to make my fan more responsive?

Thanks in advance!

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