Just realized everyone's wrong about using canned air on laptop fans

I had a Lenovo ThinkPad T480 in the shop last week that was overheating. The usual advice is to blast the fan with canned air to clean it. I did that, and the fan started making a loud grinding noise about an hour later. I took it apart and found the air blast had forced dust deep into the bearing. I had to replace the whole fan unit, which cost the client $45. Now I only use a small brush to clean fans before I gently vacuum the area. Has anyone else had a fan die right after using canned air?

2 comments

2 Comments

davidwright2h ago

I read a tech forum post ages ago where a guy swore canned air killed his PS4 fan the same way. He spun the blades up way too fast and it wrecked the bearing. @tyler_hall9 has the right idea with the toothpick trick, stopping the fan first is key. I still avoid the canned stuff now, a soft brush seems safer for those tiny laptop bearings. That grinding noise is a death sentence.

tyler_hall94h ago

What if you just hold the fan still while you spray it? I always stick a toothpick in the blades to stop them spinning. That way the air goes around the blades and pushes the dust out, not into the bearing. Been doing it for years on dozens of laptops and never killed a fan. A brush is good for big clumps but canned air gets the fine stuff.