Fan kicking in yet temps are good.

[mrwoof]

Acer Laptop : W8.1 i7 6Gb Ram
Noticed fan kicking in more than usual, so installed Core Temp to monitor temp. I assumed Air intake possibly restricted with dust etc but I see the device is not running hot.
Screen shot at idle showing all well yet fan on & off, nothing loud but new unexplained behaviour.
Thoughts? 

[Boggin]

I have a laptop that does that even though the temps seem normal.

Can you buy an Air Duster can if you don't have one to blow the machine out.

On some machines there's also an air intake through the keyboard so it's best to give that a blow out as well.

[mrwoof]

The thing is with air duster, I'm just forcing the dust from the intake further through the cooling system. I'm reluctant to disassemble this Acer E1-571 to access & clean as involves removing keyboard etc, however I have the video instructions saved should I venture there. Initially I thought the thermal paste degrading however temps don't suggest that. 

[Boggin]

I occasionally just blow over the keyboard on my Toshiba laptops - there's no need to disassemble and blowing away the build up of fluff around the intake has proven sufficient for me as well as a blow around the exhaust.

I use the free version of HWMonitor to view my temps - https://www.cpuid.com/softwares/hwmonitor.html