A 'clicking noise' suggest it may be a HDD issue. Do run the hardware west that shldr2thewheel suggests. Also make certain that you have all of your data backed up and you might open Disk Utility and check out 'First Aid'.
thank you for your answers.
No I haven't tried apple hardware test yet. It will be my next task.
Hi. First aid shows everything is ok
With all the respect, I'm now sure that the noise comes from both (or one) fans.
To add to my first post, the computer's performance has not been affected and it hasn't shown any other processing slow-downs etc..
I also run the Apple Hardware Test (not the extended one). It found no problems at all.
After that, it seems I've done everything it was suggested in the forums.
-Printer pending jobs.
-Opened and cleaned the dust inside and around the fans.
-Run Apple Hardware Test.
So do you think I should go for fan replacement?
As you probably know the fans are always engaged when you turn on your MBP. Fan noise should only be prominent when you are running some intensive CPU processes. If you hear this noise all the time, I would suggest you do address the fans. Oiling them may not be a good idea. Often such components are permanently lubricated and adding the wrong lubricant may do more harm than good. Replacement would be the best strategy.
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