Dust, Heat and Fans: Keeping Your Computer Cool
Heat shortens the life of electronic parts and makes processors slow themselves down. Fortunately, the causes are usually simple.
What overheating looks like
- Fans that roar even during light tasks.
- A keyboard or case that is uncomfortably hot.
- Programs that stutter after a few minutes of work.
- Sudden restarts or shutdowns.
Where the heat comes from
Dust is the main enemy. It builds up on fan blades and in the fins of heatsinks, acting like a blanket. Poor placement matters too: a computer pushed against a wall, or a laptop used on a duvet, cannot breathe.
Placement fixes
- Leave several centimetres of free space around vents.
- Use laptops on a hard surface or a stand.
- Keep computers away from radiators and direct sunlight.
- Keep desktop cases out of closed cupboards.
Cleaning, done safely
- Shut down and unplug the computer.
- Take the side panel off a desktop, or aim at the vents on a laptop.
- Use short bursts of compressed air, holding fans still so they do not spin wildly.
- Wash removable dust filters and let them dry fully.
- Reassemble and test.
Check the software side
Close programs that run heavy tasks in the background. Keep drivers and system firmware current, since updates sometimes improve fan control.
When the problem remains
Old thermal paste dries out after several years. Replacing it can lower temperatures noticeably, but it involves taking the cooler off. If you are not comfortable, a repair shop can do it quickly.
A calendar habit
Check for dust every three to six months, or more often if you have pets or live somewhere dusty.
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