How to repair CPU Fan Error in BIOS

CPU fan error is a common message which can appear whenever you start a laptop or PC powered by Windows.

This is the reason why we are here to show you how to repair CPU fan errors in BIOS, also known as a basic input-output system.

When the CPU fan is not able to cool down the components inside it properly, this CPU fan error appears.

Also Read: How to Fix Error 0x0 0x0 permanently?

It is caused by overheating and it does not let the components inside it run normally which is why your system cannot boot up.

While this is an error, it is a good one and it shows that the CPU fans are not working but the BIOS is working as intended.

If the CPU fans are not working and your components run then they will overheat and it could also lead to fire inside your CPU.

How does a CPU Fan Error occur?

The CPU Fan Error occurs when you start your PC and it is usually caused by overheating components

This error occurs when your CPU Fans stop working for some reason.

The error message reads as below:

Error: CPU fan has turned off.

CPU fan error!

Why does CPU fan error occur?

There are several reasons why a CPU fan error occurs and causes overheating of components inside your PC.

Here are some of the possible reasons why your CPU fan error occurs:

  • Incorrect CPU fan information settings in BIOS interface.
  • Processor fan running slow due to dust or any other obstacle.
  • CPU fan not connected properly.
  • CPU fans are damaged or broken.

The possible reasons as to why a CPU fan error can be caused are listed above. Now, we will try and explain to you how to repair CPU fan error in BIOS whenever it occurs.

How to Repair CPU Fan Error in BIOS?

CPU Fan Error inside BIOS
CPU Fan Error inside BIOS

The above picture shows you how a CPU Fan Error looks inside BIOS. If you see the same image on your screen then you are in trouble.

Read along to find out how to repair CPU fan error in BIOS.

Method #1: Reduce the default fan speed in BIOS

In order to solve this CPU Fan Error issue, you need to reduce the default fan speed inside BIOS settings.

  • Boot into your computer’s BIOS by pressing either F10, F2, F12, F1, or DEL depending on your PC manufacturer.
  • Navigate to CPU fan settings. It will be available in the Advanced Settings menu.
  • Look at the setting that controls RPM alerts. The default value should be 600 RPM.
  • Lower this value to 300 RPM and save the changes.
  • Boot the system after exiting BIOS and see if the error message comes up again or not.

Method #2: Disable CPU Fan Speed Control in BIOS

  • Boot into your BIOS once again as we did in the earlier method.
  • Go to its Settings and then go to its Advanced Settings and find the Monitor section.
  • Change the CPU Fan Speed to ignore and confirm changes.
  • Boot into Windows now and this should get rid of the error messages.

Method #3: Check your hardware

  • Check that your fans are properly connected or not.
  • Also, check whether your motherboard is properly connected to the fans or not.
  • If you see dust around the fans then remove it. You can use compressed air cans for this procedure.
  • Spin the fans manually and see if they are spinning normally or not.
  • Reapply thermal paste to avoid overheating issues.

You may take professional help for this method because it might not be possible for you to check for hardware defects if there are any.

Method #4: Troubleshooting hardware problems

If you feel that there are hardware problems in your PC that are causing the CPU Fan Error then make sure to diagnose which part of the PC is giving you issues.

  • Turn off your computer and unscrew the computer and go to the section where the fans are attached to the motherboard.

Note: These steps should be done only if you have experience doing the same. You should take professional help if this is not an area of expertise for you.

  • Make sure all the cables to the fan are connected and that there are no loose connections. Try replacing the cables as well.
  • Watch the fans spinning when you turn on the PC and see if the spinning movement is normal or not.
  • If the fan is spinning even after you have connected a new cable, it means that your fan is damaged and needs to be replaced.

If everything is correct with your fans then it might be due to a software issue which we will troubleshoot down below.

Method #5: Troubleshooting software problems.

In the above method, we troubleshot for hardware problems in our PC and found none.

So we are now going to troubleshoot our PC for software problems which are generally easier to fix and without any extra cost as well.

  • Turn on the computer and keep pressing the F10 key to enter BIOS.
  • Go to the Fan Control section under the Hardware Monitor section which will be inside the Advanced Settings in BIOS.
  • Make sure that the CPU’s Q-Fan control option is set to enabled.
  • You can see the lower speed limit set for the CPU fan which should be set to ignore.
  • Now, reboot your system and let it boot properly.

Now, your problem should be solved. If it still does not solve your problem then get your PC checked by a professional.

Here is a great tutorial on how to repair CPU Fan Error in BIOS if you prefer to watch a video tutorial on this issue.


In this guide, we have published a step-by-step method on how to repair CPU Fan Error in BIOS which you get when you boot your computer.

Make sure to share this article with others who are also facing this same issue and do let us know which method worked for you in fixing this CPU Fan Error inside BIOS.

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