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Are the fans on MacBook Pro 15inch always on? If so should they be audible when ear against keyboard?

I am not sure but I think my fans were not audible before but now I can hear them if I put my ear there.

Using istats menu I can see them running at ~2100 rpm left fan, ~2000 right fan.

The computer temperature is between 35-45 degrees celsius.

All I am asking are the temperatures, fan speed and subtle noise normal?

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Fans, which contain moving parts, will certainly make some audible noise, though it's usually rather quiet and unnoticeable. Normal speeds should range from 1800-2200 depending on your level of usage. Intensive processes see the fan speeds go up to 6200.

For temperatures, idle activity should have temperatures at 40-50 ºC (CPU PECI die) and 30 ºC for air flow proximity.

If your fans get really loud and noisy, it may be a sign that your fans are malfunctioning or there could be some form of obstruction that causes noise when air runs over it. I'd check for dust and clean out any foreign objects found.

  • the thing is, about the noise i notice, is that the left fan noise i hear the normal noise of a fan pushing air, but on the right side, its more like a refrigerator kind of noise. is that normal? Also the noise on the right side, is audible without me putting my ear against the keyboard, being in a quiet place is enough. – Petros Kyriakou Mar 22 '16 at 1:05
  • Loud, noisy fans at 2000rpm that sounds like a refrigerator are almost certainly not normal. I can barely hear my fan even in a completely silent location, so it's probably best to take it in to Apple for checks. How old is your computer? – perhapsmaybeharry Mar 22 '16 at 1:47
  • Guess i will..its not loud but definitely different sound from left fan... Its like 8 months old... – Petros Kyriakou Mar 22 '16 at 9:28

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