I've just got my dell inspiron 15 7586 and noticed an issue while using them.
When the CPU usage is at below 10% and temperature hovers between 42'C ~ 48'C,
the fan would often turn on and create noise.
From my understanding, I thought that the fans are supposed to be turned on when the CPU usage and temperature is high, however, that doesn't seem to be for my case which is annoying.
So if there is some sort of setting that I could access or suggestion to prevent this from happening , that would be greatly appreciated.
Click the links below for resolving fan noise.
Undesired fan noises on Inspiron/XPS Notebook/Vostro Notebook/Mobile Precision/Latitude systems
How to Troubleshoot Fan Issues