1Check what's using the CPU
Open Task Manager (Windows) or Activity Monitor (Mac) and close apps or browser tabs using a lot of CPU.
FREE REPAIR GUIDE
Laptop Fan Loud or Overheating? How to Fix It
Quiet a loud laptop fan and stop overheating: check apps, clean vents with compressed air, and update settings.
DIFFICULTYEasy
ESTIMATED TIME15–30 min
TOOLSCompressed air, soft brush
POTENTIAL SAVINGS$80–150Labour estimate · varies
Know what you’re replacing.
A fan that roars all the time usually means dust-clogged vents, blocked airflow, or a program using lots of CPU. Cleaning the vents and checking background apps fixes most laptops without opening them.
What you’ll need.
Compressed air or electric duster~$10–40
View on Amazon →
Laptop cooling standRaises the laptop for airflow · ~$25
View on Amazon →As an Amazon Associate, RepairAI may earn from qualifying purchases. Check that parts fit your exact model before buying.
A little preparation first.
- Save your work and shut the laptop down fully.
- Unplug the charger.
One step at a time.
2Give it airflow
Use it on a hard, flat surface. Beds and blankets block the intake vents.
3Find the vents
Turn the laptop over and find the intake vents (bottom) and exhaust vents (side or back).
4Blow out the dust
Use short bursts of compressed air into the vents. Keep the can upright, and don't let the fan spin wildly.
5Update and test
Install system and BIOS updates and pick a balanced power mode. Then check if the fan calms down.
Log in 
Troubleshooting
Clicking or grinding fanThe fan bearing may be failing — record the sound for a diagnosis.Shuts off when hotOverheating protection; the cooler may need cleaning inside or new thermal paste (shop job).Fan never stops on a MacReset the SMC on Intel Macs, or check Activity Monitor.
FAQ
Is it safe to open the laptop?Possible on many models, but it can void warranty.How often to clean vents?Every 6–12 months.
General guidance only. Turn off power, water or gas before you work and follow the manufacturer’s instructions; if unsure, call a qualified professional.