Q: Macbook Pro running hot, loud fans since 10.10.4

so i had a problem similar to this with the fan, except the fan wasn't working at all. also tried resetting smc, but to no avail. what i did, and what i recommend u to do is to open up the notebook, clean everything, take out the fan (make sure to unplug wires first to prevent ripping), clean it (compressed air recommended) and place back in (clicking noise when wires plugged back into slot). ur problem might be happening because ur pc doesn't have proper air circulation, hence more power needed by the fan to lower the motherboard's temperature.

u can also download macs fan control to monitor your fan speed and pc temperatures.

hope this helps u

I don't know if it's relevant but adding an SSD to your system can sometimes mess with the fan settings and speed. There are multiple threads on this forum concerning this matter but i couln't find them in a jiffy so try and search for yourself.

Apps can affect Mac performance, battery runtime, temperature, and fan activity - Apple Support

hey,

as linc davis mentioned, apps can definitely cause problems and hang ur pc, but since it was sudden, i dont think thats the problem (unless an app  is messing with the new system upgrade?). try downloading  macs fan control or smc fan control to monitor ur cpu temperature along with your fan speed (no malware or viruses, also have it) http://www.crystalidea.com/macs-fan-control

check if temperature of anything is abnormal (above 60-70 for cpu) u can also change ur fan speed there (custom, ~2000rpm is normal). make sure no part of ur pc is hot by touching the different areas.

regards

lol