My MacBook's fan is almost ALWAYS on and far too loud

Hi,
please advice.
My 4 year old laptop is too noisy. The fan is always on and the computer's always hot. I have browsed on this forum and following other peoples' suggestions, I reset the PRAM (by turning the computer off, unplugging it, taking the battery out, pressing the power button for 5 secs, putting back the battery, plugging the laptop back in the power socket, and pressing the power button for 5 secs). I checked the Activity Monitor and did not find any process taking up much CPU. I downloaded the Fan Control but do not understand what it tells me (left one is pumped up to 5000 RPM, right one is -1 RPM, temperature around 60 - 70 degrees celsius. Sometimes, the fan quietens down but more often than not, it is on and very loud. I cannot watch movie on it without plugging in headphones. What can the problem be and how to solve it? I am usually running the following applications at the same time: Firefox, Mail,Skype, and Microsoft Word.
Thank you in advance.

Pavla Fleischer wrote:
Upgrade to 2 GB? I'll try that! Do I have to go to the store to get this done or is that something I purchase online? How does it work? Sorry, am clueless. And thank you ever so much!
Hi,
Hope you don't mind my joining in...
Have a Look here for Increasing the RAM on your MacBook
How to remove or install memory
From the How To Section Here
http://www.apple.com/support/macbook/
For Purchasing RAM it is Extremely Important to get the Correct, Matching RAM for your machine...
This Site is highly Regarded by Users...
OWC RAM
http://www.macsales.com/
Hope this Helps,
Cheers...

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Reset the PRAM and SMC. Google will find instructions to do this.
Use Onyx (again Google will find this) and run through its gamut of Verify, Maintenance and Cleaning steps.
Reboot
If still not resolved then check Login items: System Preferences > Accounts > Login Items tab.
Try disabling all of them (you can re-enable them later)
Logout and log back in again
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Welcome to Apple Support Communities.
For the fan running continually, first try an SMC (System Management Controller) reset:
http://support.apple.com/kb/HT3964
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Apple still sells original-equipment batteries for most models from the Apple Store online.
Another reliable source of Mac products is OtherWorldComputing (www.macsales.com).
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mamberson wrote:
Is the video card going out possibly?
Very real possibility.
The fan seems to run when searching the internet.
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http://support.apple.com/kb/ht3964
If there is no change, run an Apple Hardware Test:
http://support.apple.com/kb/ht1509
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Just to narrow things down a bit.
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Laptops with a battery you can remove
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Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery.
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Release the power button.
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Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
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So my theory now is - the fans are always running on every MacBook (Air, Pro, etc) - the issue is, how fast they run. And, it would appear (from my MacBook Air experience) that the fans are generally quiet.
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My MacBook's fan is almost ALWAYS on and far too loud

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