Fans wont stop blowing

The fans of my Imac 20inch 2007 wont stop blowing. Here the thing:
After removing a stuck CD in de DVD drive the fans started to blow continuously. I didn't replace any drive, just put it back as how it was. That's for 2 years now and I'm at the moment that I get crazy. Over these 2 years I tried every thing to get it back to normal. Tried the unpluging power cable way. Tried hdd fans control and smc fan control. And tried all those little things that works for other but not for me. All the temperatures are normal and the Imac runs still smoothly after these years. But the noise of the fans is getting to much now!
Somebody any idea what might cause this problem.
Many many thanks.

Just checking...
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964
Boot off your *original* Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test. Some disks require you to use the Option key at bootup to select AHT. Some Discs have it inexplicably on Disc #2.

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[smcFancontrol|http://www.eidac.de/?p=180] could help with that, but you shouldn't need to resort to such tools.
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