What is & How to Fix CPU Fan Error in 10 Steps

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Facing a ‘CPU Fan Error’ message can be worrying as it means there’s a problem with how your computer is cooled down, which is needed to keep it working right. But with a clear set of instructions, this error can be easily overcome.

By following this guide, you’ll learn a simple way to fix the error.

What is CPU Fan error?

The ‘CPU Fan Error’ is a message you might see on your computer, alerting you that the fan, which is supposed to keep the computer’s central processing unit (CPU) cool, isn’t working as it should.

cpu fan error

This fan is essential as it prevents the CPU from overheating while it performs tasks.

When the fan isn’t working correctly, the CPU can get too hot. Just like we feel warm when we exercise, the CPU heats up when it’s working, and the fan helps cool it down to prevent any damage.

What Causes the Fan Error in the CPU?

Several factors can trigger the ‘CPU Fan Error’ message on your computer. Some of them are listed below.

  • Dirty or Dusty Fan: Dust and dirt can clog up the fan, making it hard for it to spin properly.
  • Loose Connections: If the fan’s cable isn’t connected securely to the motherboard, it might not get the power it needs to run.
  • Faulty Fan: Sometimes, even if clean and properly connected, the fan might be broken or worn out and can’t spin.
  • Wrong Fan Settings: If the settings in the computer’s BIOS (Basic Input Output System) are wrong, the fan might not work right.
  • Blocked Airflow: If something’s blocking the airflow around the fan, it might not be able to cool the CPU properly.
  • Software Glitch: Occasionally, a software bug might cause a false error message, even if the fan is working fine.
  • Mismatched Fan and Motherboard: If the fan and the motherboard aren’t compatible, they might not communicate well, leading to an error message.
  • Damaged Motherboard: Sometimes, a problem with the motherboard can cause the CPU Fan Error, if it can’t send the right signals to the fan.

How to Fix CPU Fan Error?

Regardless of the specific scenario or error message you encounter, there are some general solutions you can try to fix CPU fan errors before considering further actions.

  1. Check Fan Connection:
    • Power down your computer and unplug it from the electrical outlet.
    • Open the computer case; you may need a screwdriver.
    • Locate the CPU fan and ensure its cable is securely connected to the motherboard. The connector is usually labelled “CPU_FAN” on the motherboard.
  2. Clean the Fan:
    • Ensure your computer is off and unplugged.
    • Use a can of compressed air or a soft brush to gently clean the dust off the fan blades and the surrounding area.
  3. Inspect for Obstructions:
    • Check for any cables or other objects that might be obstructing the fan or the airflow around it.
    • Gently move any obstructions out of the way.
  4. Check Fan Functionality:
    • Power on your computer with the case open to see if the fan spins.
    • If your desktop computer has a side window, you can look through it to check the fan. If not, remove the side panel to have a look while the computer is running.
    • For laptops, hold your hand in front of one of the exhaust vents to feel if the air is blowing out.
  5. Replace Faulty Fan:
    • If the fan isn’t spinning, consider purchasing a new fan compatible with your motherboard and CPU.
    • Install the new fan following the manufacturer’s instructions.
  6. Update CPU Fan Settings in BIOS
    • Restart your computer and enter the BIOS setup (Different companies have different default keys for entering bios settings, find yours by checking your hardware company’s website).
    • To enter the BIOS setup, you will need to tap one of the keys from F1, F2, F10, F12, Del and Esc as soon as your system starts
    • Click “Advanced Settings” and then “CPU Fan
    • Enable “Active Heat Sink” & “Fan Duct with Fan
    • Save the changes made and leave the BIOS settings
  7. Disable Fan Speed Monitor
    • Restart your computer and start tapping F1, F2, F10, F12, Del or Esc
    • Enter the BIOS settings after successfully using the right key
    • Go to “Monitor” and “Fan Speed Monitor
    • Click N/A then “Ignore
    • Exit the Fan Speed Monitor Settings and click Save Changes
    • Restart your system
    • Note – Changing this setting will disable all future CPU fan speed errors and prevent your system from detecting overheating issues
  8. Check for Software Updates:
    • Ensure your computer’s operating system and motherboard drivers are up-to-date.
    • Update any outdated software or drivers that might be causing the fan error.
  9. Seek Professional Help:
    • If the error persists after following the above steps, consider consulting a professional technician.
    • Take your computer to a reputable repair shop or contact the manufacturer’s support for further assistance.
  10. Seek Professional Help:
    • If the error persists after following the above steps, consider consulting a professional technician.
    • Take your computer to a reputable repair shop or contact the manufacturer’s support for further assistance.

How to Prevent the Error in Future?

We need to follow the same methods to prevent the error from occurring in the future. Summarizing the points mentioned in the above section and adding some new ones.

  1. Regular Cleaning: Keep the fan and the surrounding areas clean from dust and debris to ensure smooth operation.
  2. Adequate Ventilation: Ensure your computer is placed in a well-ventilated area to prevent overheating and facilitate proper airflow.
  3. Correct Installation: Make sure the fan is properly installed and securely connected to the motherboard.
  4. Avoid Blocking Airflow: Don’t place objects near the computer’s vents, and ensure cables inside the case are organized to avoid blocking the airflow.
  5. Regular Inspection: Periodically inspect the fan for any signs of wear, damage, or unusual noises that might indicate a problem.
  6. Update BIOS and Drivers: Keep your BIOS and motherboard drivers updated to ensure they are compatible with your fan and other hardware.
  7. Use Quality Parts: Opt for high-quality, reliable fans and other cooling system components to prevent issues.
  8. Monitor Temperatures: Use software to monitor your computer’s temperatures to catch potential problems before they cause errors.
  9. Seek Professional Help for Installation: If unsure about installing or replacing fans, consider consulting a professional technician to ensure it’s done correctly.
  10. Avoid Overclocking: Avoid overclocking your CPU as it can generate additional heat and strain the cooling system.


In conclusion, encountering the ‘CPU Fan Error‘ message on your computer can be concerning, but as shared through this article, it can be easily fixed.

By understanding what causes this error and following the steps outlined, like checking the fan connection, cleaning the fan, or updating some BIOS settings, you can get your computer back on track.

If you still have doubts or queries after implementing the steps, please comment down below. We will reach out to you in no time.

CPU Fan Error FAQs

1. What is a CPU fan error?

A CPU fan error occurs when the computer doesn’t detect a fan, or the fan isn’t functioning properly, which can lead to overheating.

2. Why is my CPU fan error appearing at startup?

The error typically appears at startup when the BIOS doesn’t receive a signal from the fan, indicating potential hardware issues or connection problems.

3. Can I use my computer despite the error message?

It’s risky. Using your computer with a malfunctioning fan can lead to overheating, which might damage the CPU and other components.

4. How can I fix the CPU fan error?

Start by checking the fan’s connections to the motherboard. Ensure it’s clean from dust, and if it’s still not working, consider replacing it.

5. Is it expensive to replace the CPU fan?

Generally, no. Basic CPU fans are affordable, but prices vary depending on the model and brand. Always ensure compatibility with your system.