Hello - just an experience I wanted to share. My 2011 Macbook Pro, 15, 2011 early has been quite noisy - fans running often at max RPMs, for long periods of time. Quite disturbing.....The temperature was never below 62 degree C after a few minutes warmup. As I was switching to an SSD, and had the machine opened, I decided to try to clean the fan outlets, which requires removing the fans. I found out the fan outlets almost completely clogged by dust ! Now, with the fan outlets clean, the Mac is running some 15 degree C cooler ( right now at 45 degree C ), and this with only 1 fan. If you wonder about the one fan - I managed to destroy the connector on the right fan. I ventured to to run the computer with one fan only for now - iStats shows no hot parts, so-far-so-good. Now the challenge of finding replacement fan on Ebay, that ships to the Czech republic. And what makes me a bit angry - when the Apple service here in the Czech republic was replacing my battery under Applecare last year, I asked them to clean it. My guess is they did not, based on the noise the machine was making, and the amount of dust. PaulCC.