Macbook Pro Fans Not Adjusting

I have a 17' Macbook Pro 2.4Ghz with 4GB SDRAM. Right now it is running at 61 degrees Celsius and the fans remain at 2000rpm. They always remain at 2000rpm regardless of CPU load. The only time they increase is when I charge the MBP. I just completely reinstalled OS X 10.4, everything is essentially brand new. What do I do about this? I took it into the Genius Bar and they said they couldn't replicate the problem so I have no idea what needs to be done.

This article may prove useful:
http://support.apple.com/kb/TS1473
If some process is running out of control in the background, temps can rise as well as using up more battery capacity.
Another option is to download and install SMCfancontrol v2.1.2 (freeware). It lets you configure a higher fan idle speed. I have it on my MBP and set to idle the fans at 2250 rpm. This gives the cooling system a headstart on moving air, and there is an easily accessible icon in the menu bar that lets you temporarily bump the speed higher. I find that function useful after I've been watching podcasts (video seems to run up the temps) and want to close the lid but not on a hot keyboard. I pop up the speed to about 4000 rpm and the the temps come down pretty fast.
The MBP is said to tolerate temps up to 100°C (212°F) before shutting down; you have quite a ways to go.
Allan

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Hy myneck,
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http://support.apple.com/en-us/TS1367
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Disconnect all accessories that are plugged in to the computer, such as a printer, hub, or other mobile device.
If your Mac supports user-installable memory, solid state drive, or hard drive, and you recently installed any of these, make sure they are installed correctly and are compatible with your computer. If possible, reinstall the original memory or drive into the computer to find out if the behavior persists afterwards.
MacBook Pro: How to remove or install memory
MacBook: How to remove or install memory
Mac Pro: How to remove or install memory
Mac mini: How to remove or install memory
iMac (27-inch, Late 2012): Installing or replacing memory
iMac: How to remove or install memory
Reset the SMC.
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My MacBook Pro does not save bettery life.i use 4 hrs for the full charge better instead of 7 hrs.what is the problem.Please help.

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7 hours mentioned is possible when run under lab conditions.
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In the meantime, I could avoid:
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- Using your notebook on your lap. That can raise its temperature thirty or more degrees.
- Dust or dirt can choke the fans, increasing temperatures and even the risk of fire.
Replacement of a fan is not very expensive, if it comes to that. You can also do it yourself:
http://clarebayley.com/2011/10/how-to-replace-a-macbook-pro-fan/

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I have the same trouble with mine. I took it in for repair as it had a logic board issue, and they gave it back to me yesterday, but when I started using it, the fans ramped up to 6000rpm constantly for the entire day.
This morning I installed Fan Control to see if that would help, but it appears that Fan Control is not actually doing anything. The fans have been stuck around 4400 rpm at 35 degrees celsius even though I told Fan Control not to run at anything above 2000rpm until it gets to 40 degrees.
Is there a mysterious apple setting that says don't go above 35 degrees, or if you do ramp up the fan speed to max until it gets below it again, because according to Fan Control that is what is happening. It is not logical to be wanting to keep a powerful modern laptop at that temperature when the fan noise is so high. 45 degrees would be a fine operating temperature.
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