GuidesHow To Fix CPU Fan Not Spinning

How To Fix CPU Fan Not Spinning [Tested Methods]

Here are some reasons and their solutions for the CPU Fan not spinning.

Expert Verified by Nauman Siddique

CPU fan not spinning is a widespread problem faced by many users. There can be several reasons for this problem, such as dusty fans, worn-out bearings, or misconfigured BIOS. Thankfully, cleaning and oiling the fans or resetting the BIOS, along with other solutions, can help fix this issue.

Key Takeaways
  • Dust, debris, worn-out bearings, or incorrect BIOS settings often prevent the fans from spinning.
  • Oiling the bearings, cleaning the fans, and resetting the BIOS have been helpful for many people in this case.
  • A faulty power supply can also be the cause of this problem. In that case, replacing the PSU is the best option.
Important: Before moving on, try resetting the BIOS settings, which may be a quick solution to non-spinning CPU fans. If that doesn’t work, cleaning the CPU fans might do.

Oiling The Bearings

If you do not lubricate your bearings occasionally, there will come a time when they won’t spin so smoothly. Eventually, the bearings will become rusty and wear out due to no oiling. They will stop spinning. Therefore, you must add oil or any suitable lubricant to your fan’s bearings. This will extend the lifespan of your fan as well.

Follow these steps to lubricate your CPU fan bearings:

  1. Detach Your Motherboard: Open your PC case and take out the motherboard.
    Remove The Motherboard From The Case
    Unscrew And Take Out The Motherboard From The Case (Image By YT/AIR BEAR)
  2. Remove Fan Power Cable: Unplug the CPU fan’s power cable from the motherboard.
  3. Unscrew The Fan: Four latches will be on each corner of the fan. Turn them with a screwdriver in the direction printed on them.
    Removing CPU Fan From Motherboard
    Loosening The Latches With A Screwdriver (Image By YT/Rollwith Punch)
  4. Loosen The Lathces: Lift each latch until it pops up and becomes loose.
  5. Remove The Fan: Take out your fan and lubricate its bearings with oil. 
  6. Reconnect The Fan: Re-attach the fan by following the above methods in reverse.

Changing Your PSU (Power Supply Unit)

A Power Supply Being Showcased
An NVME Power Supply (Image By Tech4Gamers)

A faulty power supply can also be why your CPU fans don’t spin. Moreover, a wrong voltage supply can easily damage your components. Additionally, if your PSU makes beeping sounds, or certain components besides your fan are not running or go off abruptly, you should try replacing it and see if doing so fixes the problem.

WARNING: Excessive use can also lead to overheating, which will probably affect your computer fan. 

Final Thoughts

CPU fans often misbehave due to wear out or rust. Cleaning them occasionally is necessary to maintain their life. Sometimes, incorrect BIOS settings or faulty PSU can also cause the fans to stop spinning. I would suggest resetting the BIOS first to prevent the hassle of cleaning the fans. Still, cleaning CPU fans every now and then shouldn’t be avoided.


Common Questions

How do I adjust the fan speed?

Press the BIOS key repeatedly to launch BIOS automatically. Afterward, refer to the reset bios section above. Look for Hardware or Cooling settings. Here, you can select your fan’s desired rotation per minute (RPM).

What is the lifespan of CPU fans?

CPU fans’ lifespan depends on several factors. One of the most common ones is whether they are cheap or expensive. The cheap ones can last up to 3-5 years. However, expensive ones can last up to 5-10 years. Maintenance also plays a big role.

What heat range is safe for my CPU?

This entirely depends on the use of the PC. However, a temperature between 40-65C is safe for general use.


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