crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 mayer

crwdns2934249:0crwdne2934249:0:

Yeah that sounds like a fan to me. Take the back off and press on the center of the fan and see if it reseats. Also, at that time you can disconnect the fan and actually see if I am correct.
+https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Retina+Display+Mid+2012+Left+Fan+Replacement/9719

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Yeah that sounds like a fan to me.  Take the back off and press on the center of the fan and see if it reseats.  Also, at that time you can disconnect the fan and actually see if I am correct.

crwdns2915684:0crwdne2915684:0:

open