Why my fans loud

my fan runs all the time and is loud even after cleaning with air. the core temp stays around 40 c. should i replace the fans and were would i buy replacement parts

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Hi,

What OS is installed in the laptop?

If Win 10 right click on the Taskbar and click on Task Manager > Processes and check what the % is for the CPU etc.

If high % check which process is using the CPU the most and why it is running.

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