Fan stopping causes subtle "click" sound

[nejc92]

I've recently bought a new macbook pro 13 retina (early 2015) and I've noticed that when the fan stops it causes a subtle but noticeable "click" sound. I was able to reproduce this with the yes stress test. To test this type yes > /dev/null & yes > /dev/null & yes > /dev/null & yes > /dev/null & in the terminal, wait for the fan to start working and then stop the processes with killall yes. After a few seconds (I suspect when the fan is slowed down to the certain speed) a subtle "click" sound appears. Is the fan designed that way, so it doesn't spin unnecessarily? Or should I consider returning the unit? Thank you for the responses.

 

[danwestbrook]

I used to have that on my 15" 2012 Mac Pro just had the right fan replaced recently and been fine ever since, I would book in with Apple and arrange a replacement, mine was only £18 as it was out of warranty.

 

[Toutou]

Yes, the fan is supposed to stop completely (this is a new thing, earlier models' fans used to idle), but I'm not sure about the click.

 

[nejc92]

I've been monitoring the temperatures and everything seems to be fine. It's just the click that bothers me, not sure if I should worry about it or not.