How to Fix CPU Over Temperature Error? in 2024

The “CPU Over Temperature Error” message is not exactly the boot-up greeting message that computer users look forward to seeing. This prompt can trigger fears of having overheated components and even hardware failure on their computer system. 

But worry not, since we’ll provide you with all the information about when and why this error occurs and also lead you through the steps required to resolve it correctly.

What is the CPU Over Temperature Error?

In layman’s terms, the “CPU Over Temperature Error” is an alarm issued by your computer system when it detects that the CPU has exceeded a temperature level deemed safe for optimal functioning. The manufacturer sets this barrier to protect the CPU from reaching temperatures that might cause irreparable harm.

The error warning serves primarily as a protective measure. It acts as an early warning system, acting before the CPU enters a hazardous zone where irreversible damage is a real possibility. When your system detects that the CPU over temperature error it is approaching or beyond the established safe limits, it generates this notice, prompting remedial action.

In most cases, the CPU over temperature error is associated with overheating issues. Overheating happens when the CPU creates more heat than the cooling system can effectively remove. This can happen when performing resource-intensive tasks like gaming, video processing, or other CPU-intensive apps.

Just consider this error message as an important warning that the present cooling mechanisms are insufficient, compromised, or encountering an external impediment, such as dust collection in the cooling system. 

Related: What Is CPU And How Does A CPU Work?

Common Causes of CPU Over Temperature Error

The “CPU Over Temperature Error’ is indeed a worrisome indicator, but the issues causing this error are not unresolvable. Here, we’ll look at the common causes of CPU overheating and how to tell the difference between temporary temperature spikes and long-term problems.

Heavy Load on the CPU:

One of the most common causes of CPU overheating is prolonged exposure to high loads. Tasks such as generating sophisticated graphics, running resource-intensive software, and carrying out demanding tasks can drastically elevate CPU over temperatures error.

Monitor and regulate processes that burden your CPU. Consider spreading out resource-intensive chores throughout time to prevent extended periods of high temperatures.

CPU Over Temperature Error ASUS:

ASUS laptops are sometimes known to encounter these errors, which are usually due to faulty cooler fans. Check to see whether the CPU cooler’s fan blades have gathered too much dust or are aged, which may have caused the fan to slow down. It is advised that you clean the fan blade dust or replace the CPU cooler.


Overclocking, which involves pushing a CPU above its factory-set speed for increased performance, may create a lot of heat. While overclocking might improve your system’s performance, it frequently needs stronger cooling systems to handle the extra heat generation.

If you have overclocked your CPU, use the BIOS to restore its default settings. Assess whether your cooling system is suitable for the overclocked settings, and explore extra cooling solutions if necessary.

Insufficient Cooling:

Adequate cooling is required to keep a CPU’s temperature below acceptable ranges. Dust collection, a faulty CPU cooler fan, or a poorly installed heatsink can all contribute to insufficient cooling. This is a common cause for American Megatrends CPU over temperature error. 

To avoid dust accumulation, clean your internal cooling components on a regular basis, including the CPU cooler fan and heatsink. Check that the CPU cooler fan is working properly, and verify the heatsink for appropriate placement.

Troubleshooting Common Issues That Cause the Error

Some common general causes can bring about this CPU over temperature error. Luckily, most of them can be examined and fixed by a layperson. Here are some of the main causes and possible solutions:

Related: What is CPU and its components? 

CPU Cooler Fan

Noctua NH-D15, Premium CPU Cooler with 2x NF-A15 PWM 140mm Fans For Desktop

Cooler Master Hyper 212 Halo Black CPU Air Cooler, 120 Halo² Fan, Dual Loop ARGB,154mm

be quiet! Pure Rock 2 150W TDP CPU Cooler | Intel-1700 1200 2066 1150 1151 1155 2011-3

The CPU cooler fan is in charge of removing the hot air generated by the CPU during operation. If the fan fails to spin or operates inefficiently, heat accumulation in the system may result in the CPU Over Temperature Error.

Begin troubleshooting with a careful visual check. Turn down your computer, unplug it, then open the chassis to access the inside components. Ensure that there are no physical impediments to the CPU cooler fan’s movement. Dust, wires, and other debris may hamper the fan’s rotation. Also, check the fan blades for any damage or anomalies. Damaged blades can obstruct airflow and cause insufficient cooling.

A fully operating CPU cooler fan should be attached to the motherboard’s CPU_FAN header. Follow these steps to confirm the connection:

After affirming that connection, check CPU fan voltage readings in BIOS/UEFI settings (they should be in hardware settings or something like that, depending on which BIOS/UEFI you are using); they should be around 12V. If not, then there is definitely a problem with the CPU cooler fan, and you will need to have it replaced. 

Related: How Hot Is Too Hot For CPU 

Examine the Heatsink and Reapply Thermal Paste

By dispersing heat created during CPU activity, the heatsink helps to keep your CPU at an ideal temperature. Essentially, it functions as a heat exchanger, moving thermal energy away from the CPU for effective cooling. A properly working heatsink is essential for avoiding the CPU Over Temperature Error.

Open the chassis and look for the heatsink, which is often located right above the CPU. It is made up of fins or blades that are meant to disperse heat effectively.

Examine the heatsink for any indications of poor installation. Loose screws or misalignments might reduce its efficiency. Ensure that the heatsink is securely secured to the motherboard’s appropriate mounting points.

A thermal paste is used on heat sinks to allow for good heat transfer. You can reapply thermal paste to improve heat transfer efficiency. To do that, run your computer for about 30 minutes to warm up the paste, then power down the system. Take the heatsink out carefully from your chassis, and use a lint-free cloth or coffee filter and isopropyl alcohol to thoroughly clean the CPU’s Integrated Heat Spreader (IHS) and heatsink surfaces. 

Place a small drop of the new thermal paste in the center of the CPU’s IHS. Gently reinstall the heatsink on the CPU, allowing the paste to spread evenly. Keep the heatsink constant throughout this operation. 

You’re all done now; reassemble the system and power it up. To see if can avoid the CPU over temperature error press f1 to run setup, check the temperatures to notice the difference you’ve made by applying the thermal paste. 

Removing CPU Overclocking

CPU overclocking is a technique used by enthusiasts and power users to get more performance out of their processors. However, this improvement in performance frequently comes at the expense of greater heat generation. When a system does not have enough cooling to manage the high temperatures associated with overclocking, it can cause the dreaded “CPU Over Temperature Error.”

Overclocking is just pushing the CPU above its factory-set clock speeds, resulting in more calculations per second. While this can improve overall system performance, it also increases thermal output, which may push the CPU beyond its safe temperature range.

To fix the CPU Over Temperature Error caused by overclocking, reset your CPU settings to their default defaults. To do that, During the boot process, hit the specified key to access the BIOS/UEFI settings (Del, F2, F10, and Esc, etc). Once in the BIOS/UEFI menu, go to the advanced settings and locate the overclocking settings, which are usually found under CPU configurations. Restore the settings to ‘Default,’ and finish the process by selecting ‘Save and Exit.’ 

By cancelling the overclocking, you are removing the extra load on your computer system, which will reduce the likelihood of encountering the CPU over temperature error. 

Create Proper Ventilation

When your computer’s components are working hard, they will generate heat. Without a sufficient heat dissipation system, internal temperatures might spike, resulting in the CPU Over Temperature Error.

Place your PC in a well-ventilated environment. Avoid confining it in tight places or positioning it against walls since this might disrupt the system’s natural airflow.

Dust and dirt can restrict airflow, which slows the cooling process. Clean the space surrounding your computer on a regular basis to minimize dust accumulation and ensure proper ventilation.

Elevating your computer case slightly might help improve ventilation. Consider putting it on a platform or utilizing case feet to make a space between the case and the surface.

Maintain an appropriate room temperature. Excessive ambient heat can lead to greater internal temperatures, making it more difficult for your system to remove heat properly.

Case fans are essential for keeping your computer at optimal temperatures. Upgrading or installing more fans may greatly improve cooling efficiency. Invest in high-quality case fans with enough airflow and static pressure rating. This guarantees that air flows properly through the casing, cooling the components efficiently.

Position fans strategically to provide a smooth airflow path. Consider placing intake fans at the front and bottom of the case, with exhaust fans at the back and top for effective heat evacuation. Keep-case fans clean and dust-free. Regular maintenance keeps fan blades from gathering debris, allowing them to run at maximum efficiency.

The chassis you choose for your computer has a significant influence on total airflow. Look for cases that were created with ventilation in mind. Mesh panels, vents, and strategically placed fans all help to improve heat dissipation.

Run a Malware Scan

Malware, or malicious software, can significantly contribute to CPU overheating by engaging in covert and resource-intensive activities in the background. These malware force the CPU to work overtime, generating excess heat and potentially triggering the CPU Over Temperature Error.

To safeguard your system and prevent CPU over temperature error caused by malware, it’s crucial to run regular malware scans by using dedicated antivirus programs such as Norton antivirus or Bitdefender antivirus. 

Upgrade Your CPU Cooler

If your system continues to overheat despite thorough cleaning, troubleshooting, and probable component replacements, the present CPU cooler may be inadequate. Upgrading to a more robust cooling solution may be the key to overcoming these recurring difficulties.

If you are performing resource-intensive tasks such as gaming, video editing, or 3D rendering, your CPU will likely produce more heat. A high-performance CPU cooler helps keep your system thermally efficient, allowing you to push your hardware to its maximum without running into temperature issues.

Investing in an updated CPU cooler is more than simply a solution to present difficulties; it is also a long-term strategic decision. As you replace additional components or perhaps the entire system, having a dependable cooling solution means that your CPU can manage greater loads and even overclock without overheating.

Addressing CPU Over Temperature Error When It’s Not Hot

Sometimes, your system can show the ‘CPU Over Temperature Error’ message, even though the environment does not seem overly hot. Here are some possible reasons for that:

Faulty Temperature Sensors:

Temperature sensors are critical for monitoring CPU heat levels. A faulty sensor may falsely show higher temperatures, causing the mistake even in a cold environment.

Regularly monitor the temperature values to determine if a malfunctioning temperature sensor or a true temperature issue causes the error.

Related: How To Check CPU Temp & Why Its Important

System Software Issues:

Glitches or errors in the system software can sometimes cause incorrect temperature readings. Investigate recent software upgrades or modifications that may have impacted the temperature monitoring system.

Look for any recent software upgrades or changes that may have impacted temperature monitoring. Consider rolling back to an earlier system state to see whether the fault remains.

BIOS/UEFI Settings:

Incorrect BIOS or UEFI firmware settings may cause misreading of temperatures. Review and, if required, restore temperature-related settings to their default values.

Access the BIOS or UEFI settings to evaluate temperature monitoring setups. Reset settings to their default and see whether the issue is resolved or not.

Intermittent Cooling System Failure:

Even in a cool atmosphere, periodic failures in cooling system components might result in unexpected temperature rises. Inspect the CPU cooler, fans, and other cooling components for flaws.

Examine the CPU cooler, fans, and other cooling components. Check that fans are operating and that there are no impediments to optimal ventilation.

Dealing with CPU Over Temperature Error on Startup/Boot

Encountering the CPU Over Temperature Error during the startup or boot process is a severe situation that requires a quick solution because it can potentially prohibit your system from running correctly and cause long-term harm to your CPU. 

When this error interrupts the startup or boot process, it means that the CPU is reaching dangerous temperatures from the start. This is especially important since the system goes through a series of operations during startup that require the CPU to function properly. If the CPU has already overheated at this point, it might cause performance difficulties, sudden shutdowns, and, in severe circumstances, hardware damage.

The startup phase includes:

  • The initialization of hardware components.
  • The loading of critical system files.
  • The transfer to the operating system.

If the CPU overheats during these vital activities, it can trigger a cascade of failures and malfunctions across the system.

Addressing the CPU over Temperature Error at startup/boot involves a systematic approach to identifying and eliminating likely causes. Follow these steps to fix the problem:

Check External Factors

Make sure your PC is in a well-ventilated environment. Ensure that no external causes, such as direct sunshine or heat sources, are contributing to the temperature increase.

Inspect Cooling System

Turn off your system and disconnect it from the power supply. Open the computer case and examine the cooling system, paying special attention to the CPU cooler and its components. Use compressed air to clean the CPU cooler fan, vents, and any dust that has accumulated. Ensure that all cooling components are firmly installed and operational.

Examine Thermal Paste

Inspect the thermal paste between the CPU and heatsink for evidence of age or incorrect application. If the thermal paste seems dry or insufficient, reapply it to guarantee proper heat transfer.

Verify CPU Cooler Fan Operation

Turn on your PC and watch the CPU cooler fan during the starting process. Check that the fan is spinning smoothly and without any odd noises. If the fan isn’t working properly, troubleshoot it or consider a replacement.

Reset BIOS Settings

During startup, access the BIOS/UEFI settings by hitting a certain key (typically Del, F2, or F10). Depending on your motherboard, go to either the “Advanced” or “Hardware Monitor” section. To eliminate overclocking or misconfigurations, reset the BIOS settings to default or ideal levels.

Monitor Temperature in BIOS

While in the BIOS, examine the CPU over temperature error measurements. Check if the temperature is within the typical range. If the temperature remains unreasonably high, try modifying the cooling settings or conducting more investigation.

Professional Assistance

If the problem remains after trying the methods listed above, consider obtaining expert help. A computer expert can do a more in-depth investigation, looking for hardware problems or other issues that go beyond user-level troubleshooting.

Diagnosing and Fixing CPU Over Temperature Error When the System Is Off

Users can encounter this error even when their computer is shut off. This can be disconcerting, but it’s a rare occurrence. Let’s see what issues can cause CPU over temperature error problem and how to resolve it when it happens. 

Residual Heat:

Some components in your computer may retain residual heat even after you turn it off. When the system is restarted, this residual heat can occasionally cause the CPU Over Temperature Error to appear.

Components such as the CPU, GPU, or other heat-generating parts may not cool down quickly after shutdown, particularly if your computer was under significant stress before being switched off.

Malfunctioning Temperature Sensor:

A faulty temperature sensor might also be the blame. The sensor may provide erroneous temperature measurements, resulting in false warnings even when the CPU is not overheating.

Temperature sensors are critical for monitoring the system’s thermal parameters, and a failure in these sensors might cause false error signals.

Cleaning and Checking Your Internal Cooling System

A faulty temperature sensor might also be to blame. That sensor can provide erroneous temperature measurements, resulting in false warnings even when the CPU is not overheating. This is usually caused by the cooling system gathering dust and not functioning properly.

Users can easily check the cooling system inside the chassis and clean it with a compressed air blower to see if it solves the problem.  

You can examine individual components to see if one of them is faulty and try to fix it. However, seeking professional help is the recommended course of action in these cases. 


Addressing the “CPU Over Temperature Error” is critical to preserving your computer’s health and performance. We’ve outlined all the major issues that can cause this error, as well as the possible solutions to those problems. Readers should make full use of that knowledge to ensure a smooth computing experience for themselves. 


Q1: What is a CPU Over Temperature Error?

A1: The CPU Over Temperature Error is a warning or error message indicating that the temperature of your computer’s central processing unit (CPU) has exceeded the safe operating limits set by the manufacturer.

Q2: What causes CPU Over Temperature Error?

A2: The most common causes include inadequate cooling, improper installation of the CPU cooler, malfunctioning cooling fans, or issues with thermal paste application.

Q3: How do I know if I’m experiencing CPU Over Temperature Error?

A3: Your computer might display a warning message during boot, and you may notice performance issues, unexpected shutdowns, or system instability. Monitoring software can also provide real-time temperature data.

Diagnosing the Issue:

Q4: Can a faulty temperature sensor trigger this error?

A4: Yes, a malfunctioning temperature sensor can sometimes cause false temperature readings and lead to CPU Over Temperature Errors. Checking with reliable monitoring tools or replacing the sensor may be necessary.

Q5: Is overclocking related to CPU Over Temperature Error?

A5: Yes, overclocking, or pushing your CPU beyond its intended limits, can generate excess heat, leading to temperature errors. Reverting to default settings or optimizing your cooling solution may be necessary.

Preventive Measures:

Q6: How can I prevent CPU Over Temperature Error?

A6: Ensure proper cooling with adequate airflow, regularly clean cooling components from dust, use quality thermal paste during installation, and avoid aggressive overclocking without proper cooling solutions.

Q7: Can the computer case affect CPU temperatures?

A7: Yes, the case design and airflow play a crucial role. Ensure your case has sufficient ventilation and consider adding case fans if needed. Cable management can also impact airflow.


Q8: What should I do if I encounter CPU Over Temperature Error?

  1. Check Cooling System: Ensure all cooling components (fans, heat sinks) are functioning correctly and are free from dust.
  2. Thermal Paste: Reapply thermal paste if needed, ensuring proper coverage.
  3. Airflow: Optimize case airflow and consider additional cooling solutions if necessary.
  4. Overclocking: If overclocked, revert to default settings and monitor temperatures.
  5. Temperature Monitoring: Use monitoring software to keep track of CPU temperatures and address issues promptly.

Q9: Is it safe to continue using my computer after seeing this error?

A9: It’s not advisable. Continued use may lead to hardware damage or system instability. Resolve the issue promptly to prevent long-term damage.

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