Hi,
I am using Parrot OS => Parrot GNU/Linux 4.9 x86_64
Kernel: 5.5.0-1parrot1-amd64
on Lenovo legion Y540
I am trying to use custom fan control
But, it doesnt work
Given we don’t know what you tried, I am going to recommend:
sudo apt install fancontrol
(then read manual pages for it)
Keep in mind turning down your fan can lower the life length of your CPU.
btw welcome! 
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