I just got a serious problem! Today when I turned on my laptop, the fan (I suppose is the CPU or GPU fan) went crazy! I hear the sound like it is spinning at 4000/5000 rpm. The other strange things is that the sensors (I use Psensor) tell me that the fan is around 2200/2400 rmp.
All the temperatures, disk, cpu, etc. are OK and in their average ranges. I didn't find anything for managing the fan speed directly, but for the moment it's a bit annoying cause the fan it's making so much noise!
My laptop is an ASUS X551C. I've had it from 2013 and I cleaned it well more or less two years ago when I mounted an SSD.
Can someone please help me?
Update The problem seems to appear when the rpm are from 2200 to 2400 cause when the fan reach 1600/1700 rpm the noise is absent, could be only dust? I don't understand why this problem went out suddenly