HomeUncategorizedTroubleshooting the CPU Fan Error Asus Motherboards: Solutions and Fixes

Troubleshooting the CPU Fan Error Asus Motherboards: Solutions and Fixes

Troubleshooting the CPU Fan Error Asus Motherboards. Asus motherboards are renowned for their reliability and performance. However, like any computer component, they can encounter issues from time to time.

One common problem that Asus motherboard users may encounter is the dreaded “CPU Fan Error.” In this article, we will explore CPU 0 fan failure, the causes of this error and its consequences and provide a comprehensive guide to troubleshooting and fixing it.

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Understanding the CPU Fan Error

What Causes the CPU Fan Error on Asus Motherboards?

The CPU Fan Error typically occurs when the motherboard’s built-in sensor fails to detect the rotational speed of the CPU fan. Various factors, including a loose fan cable, a malfunctioning fan, or incorrect BIOS settings, can trigger this error.

Consequences of Ignoring the Error

Ignoring the CPU Fan Error can have severe consequences for your system. Overheating is the primary concern, as the CPU fan plays a critical role in CPU fan fail warning in dissipating heat generated by the processor.

Your CPU can overheat without proper cooling, leading to performance issues and potential long-term damage.

Identifying the Error Message on Your Asus Motherboard

Before troubleshooting, you must recognize the CPU Fan Error message on your Asus motherboard’s display.

This message will vary depending on your motherboard model but usually includes phrases like “CPU Fan Error” or “CPU Fan Speed Error.” Understanding the error message is the first step in resolving the issue.

What Is CPU Fan Error In ASUS?

cpu fan error asus

WHEN STARTING YOUR COMPUTER, the CPU Fan Error can be observed on ASUS motherboards and other brands. While the specific wording CPU fan failure of the error message may vary, you will typically encounter this message.

In its most basic form, the CPU Fan Error serves as a notification from the motherboard, indicating its inability to detect a functioning CPU cooling system.

The motherboard takes a precautionary measure by preventing the computer from booting because running a CPU without adequate cooling can lead to overheating, potentially jeopardizing the CPU’s reliability.

Essentially, this error is a built-in safety feature of the motherboard designed to safeguard your CPU and prevent it from overheating, thereby preserving the health of internal components.

While the root cause of this error may seem apparent, finding a solution can be more complex. Surprisingly, you may still encounter this warning even if your CPU cooler is correctly connected and functioning.

What can be done to address this issue? This comprehensive guide will detail each potential solution step by step, allowing you to continue using your system without disruptions.

Troubleshooting Steps

cpu fan error asus

Checking Physical Connections

  1. Verify the Fan’s Power Cable: Ensure the fan’s power cable is securely connected to the motherboard’s CPU fan header. A loose or disconnected cable can trigger the error.
  2. Secure Attachment: Confirm that the CPU fan is correctly and firmly attached to the CPU fan header. Loose connections can also lead to an error message.

BIOS Settings Adjustment

  1. Accessing the BIOS/UEFI Interface: Restart your computer and access the BIOS/UEFI interface by pressing the designated key (usually Del, F2, or F12) during startup.
  2. Adjusting Fan Speed Settings: Inside the BIOS/UEFI, navigate to the fan control settings. Adjust the fan speed settings to ensure they are correctly configured. Sometimes, a simple BIOS tweak can resolve the error.

Cleaning and Maintenance

  1. Removing Dust and Debris: Over time, dust and debris can accumulate on the CPU fan and heatsink, obstructing airflow. Carefully clean both the fan and heatsink to ensure proper cooling.
  2. Cleaning the Motherboard and CPU Area: Dust can also accumulate around the motherboard and CPU area. Use compressed air or an antistatic brush to clean these areas thoroughly.

Replacing the CPU Fan

  1. Selecting a Compatible Replacement: If your CPU fan is malfunctioning, it may be time for a replacement. Ensure that the replacement fan is compatible with your Asus motherboard.
  2. Installing the New Fan Correctly: Follow the manufacturer’s instructions to install the new CPU fan correctly. Proper installation is crucial to prevent future errors.

Advanced Troubleshooting

Monitoring CPU Temperature

  1. Using Software Tools: Install software tools to monitor your CPU’s temperature. This can help you keep an eye on your system’s health.
  2. Understanding Safe Temperature Ranges: Familiarize yourself with safe CPU temperature ranges to prevent overheating.

Diagnosing Potential Motherboard Issues

  1. Checking for Motherboard Damage: Inspect your motherboard for physical damage, such as burnt components or connectors.
  2. Updating Motherboard Firmware: Check if BIOS/UEFI updates are available for your motherboard. Sometimes, a firmware update can resolve compatibility issues.

Seeking Professional Help

  1. When to Consult Asus Customer Support: If you cannot resolve the CPU Fan Error independently, consider contacting Asus customer support for expert guidance.
  2. Visiting a Computer Technician: If all else fails, visiting a computer technician may be necessary. They can diagnose and repair hardware issues that you might have missed.

Preventing Future CPU Fan Errors

Regular Maintenance Routines:

Make regular cleaning and maintenance of your system a habit to prevent dust buildup and fan-related issues.

Monitoring System Health:

Monitor your system’s temperature and fan performance early to catch potential problems.

Upgrading Cooling Solutions:

Consider upgrading your CPU cooling solution, such as investing in a more efficient fan or liquid cooling system, to ensure better heat dissipation.

Failure of CPU Cooler

Sometimes, a CPU cooler can stop working due to various reasons. It could be because of rust caused by liquid damage, a pump in an AIO (All-In-One) cooler giving up, or a fan in a cooler suddenly breaking down.

If you’re using an air cooler, the solution is relatively straightforward. You can buy a new fan to replace the faulty one. However, if you have an AIO liquid cooler, you might have to contact the manufacturer for a replacement since it’s a bit more complex.


A few unfortunate individuals might receive a CPU cooler with a fan that doesn’t work right from the start, referred to as “Dead On Arrival” or DOA.

In such a situation, your best action is to contact the seller and request an “RMA” or Return Merchandise Authorization.

It could be a better experience when this happens while assembling a new PC, but the odds of it occurring more than once are quite low, which can provide some comfort.

To confirm that the CPU cooler fan is indeed DOA, connect a different fan to the CPU_FAN socket and ensure the computer starts up correctly.

However, it’s important to refrain from using the PC in this setup since the CPU won’t receive proper cooling, which could lead to problems.

What will happen if the CPU fan fails?

When a computer’s central processing unit (CPU) experiences a malfunctioning fan, it can lead to overheating. In such situations, built-in safety mechanisms typically are designed to either shut down the CPU or reduce its performance to prevent catastrophic damage.

However, if these protective measures fail or do not activate promptly enough, the CPU’s temperature can rise beyond its safe operating limits, potentially causing permanent damage.

Read on to learn how to mitigate high CPU temperatures in Windows 10 & 11 and prolong your CPU’s lifespan.

Alternatively, you can resolve the issue by replacing the CPU cooler, which is a simple task. Did our article assist you in addressing the Asus water-cooling CPU fan error? Please let us know by leaving a comment in the section below.

Bonus Tip: To fix the American Megatrend CPU Fan Error

This is the solution that cpu fan fail a user on the tech forum suggested. It works cpu fan speed lower limit for him, so it can also solve cpu fan asus your problem.

I kept getting this error when I opened the DELL and started. The asus american megatrends fan on the power supply worked. The fan on the motherboard/processor American megatrends Asus worked fine.

The fan in the head of the Hard drive was the non-responsive one. However, Asus CPU fan error after the bios update. This fan was tested CPU fan error asus Reddit on another PC and worked fine.

Disconnect the non-working fan (just the cable), Asus CPU fan error press, and boot up the PC. How to fix CPU fan error asus? When CPU fan error on boot but a fan is running, the error screen pops up; select F2/F1.

Clear cpu fan error aio out the Event log errors (in the BIOS). While the PR is running, CPU fan error asus water cooling connect the fan back to the motherboard. (If the fan turns on right after you do it, then your problem will likely be solved).


Addressing the CPU Fan-Error on your Asus motherboard is essential to maintain system stability and prevent overheating-related issues.

By following the troubleshooting steps outlined in this guide, you can diagnose and resolve the error, ensuring the longevity and performance of your Asus motherboard. Regular maintenance and vigilance will help keep your system running smoothly for years.


Why Does My Asus Motherboard Keep Saying CPU Fan Error?

Your Asus motherboard displays the “CPU fan error” due to issues with your CPU cooling system. It’s crucial to address this error promptly to prevent CPU overheating and potential damage.

Explore solutions to solve this issue and ensure your system’s optimal performance.

Is CPU Fan Error Serious?

CPU fan error is the warning for-users when the computer shuts down automatically due to overheating and the fan(s) cannot cool the device completely. If your fan has errors and the computer overheats, the result is very serious.

Many other components of the computer will be damaged permanently.

What Controls CPU Fan Speed?

Most modern motherboards feature hardware monitoring chips capable of performing fan control, usually through the PWM method, as described above. Once the operating system is booted, these chips can be configured through BIOS or specialized software.

How to Disable CPU Fan Error ASUS?

To turn off CPU Fan Error on ASUS motherboards, enter the BIOS settings, navigate to the “Monitor” or “Hardware Monitor” section, locate the “CPU Fan Speed Low Limit” option, and set it to a lower threshold or “Ignore.” Save changes and exit. Ensure proper cooling to avoid overheating issues.

How to Fix CPU Fan Error ASUS?

To resolve the “CPU Fan Error” on ASUS motherboards, follow these steps: 1. Check fan connections. 2. Clean the fan for dust buildup. 3. Update BIOS. 4. Disable Q-Fan control in BIOS. 5. Replace the fan if necessary. Ensure your PC’s optimal performance with these simple solutions for ASUS CPU Fan Errors.

How to Bypass CPU Fan Error ASUS?

To bypass the CPU fan error on an ASUS motherboard, first, enter BIOS/UEFI settings. Navigate to the “Advanced” or “Monitor” section and locate the “CPU Fan” option. Turn off any fan monitoring or set a lower threshold. Save settings and exit.

This quick fix resolves ASUS CPU fan errors efficiently.

How to Fix CPU Fan Error ASUS Aio?

To resolve a CPU Fan Error on an ASUS AIO (All-In-One) computer, follow these steps:

  1. Restart the system and enter BIOS.
  2. Turn off the fan monitoring feature.
  3. Check the fan connections and ensure they are secure.
  4. Update BIOS and chipset drivers.
  5. Replace the fan if necessary.

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How to Turn Off CPU Fan Error ASUS?

To resolve the “CPU Fan Error” on ASUS motherboards, follow these steps:

  1. Enter BIOS by pressing Del or F2 during startup.
  2. Navigate to the “Monitor” or “Hardware Monitor” section.
  3. Disable “CPU Fan Speed” or set a lower threshold.
  4. Save settings and exit. This simple guide helps you troubleshoot CPU fan errors on ASUS motherboards effectively.


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