How can I tell if my computer case fan is sucking or blowing air?
Question
How can I tell if my computer case fan is sucking or blowing air?
Answer
Many computer case fans today will have small arrows on one of the sides of the fans to help indicate
the direction air is blowing. As can be seen in the picture to the right, the fan is blowing down. Look for a small arrow indication to see
what direction the air is blowing.
Unfortunately, not all case fans will have these arrows. So it will require some additional investigation if your unable to find any arrow on the case fan. Often, the easiest method would be to plug the fan in and place a tissue on one of the sides of the fan to determine if it blows away from the fan or sucks into the fan.
Related questions
How can I change a fan from suck to blow?
Flipping the fan so it is screwed into the case opposite of how it is now will change it from suck to blow.
Additional information
- Should my computer fans be sucking or blowing?
- See the computer case fan definition for further information and related links.