[5 Fixes] CPU Fan Error Fix on Windows PC Boot

CPU fan error is a common issue that occurs in Windows PCs. It can be caused by overheating the computer, which can be a frustrating situation for the user. This problem occurs when the fan cannot provide adequate cooling to the hardware, resulting in an increase in temperature, which causes a CPU fan error.

After that, the CPU fan error notice appears on the computer screen, indicating that the fans are not working and the temperature is rising, leading to irreparable damage to the system components if not addressed.

CPU Fan Error: What Causes It?

The CPU fan error on boot but fan is running error can be caused by various factors. Let us get into this:

  • Most it causes due to both software and hardware difficulties
  • In case of physical damage to the fan
  • Misusing the BIOS interface to change your fan information
  • In case of device’s air vent get choked by dust or other small particles which causes the CPU to stop working
  • The computer overheats due to external influences, causing the fan to spin at unusually high speeds.

So, now that you know some of the typical causes of the issue let’s look at how the CPU fan error occurs.

How to Fix a CPU Fan Error 

Since the CPU fan error is a significant issue, we have a few options for resolving it, including the following.

Cpu Fan Error Fix 1 –Examine the hardware

Firstly, ensure secure fan connections. Look into the relationship between the motherboard and the computer.

Disconnect the fan and clean the dust from the blades. You may clean it with compressed air.

Examine the cooling fan to determine if it is whirling and functioning correctly.

Reapply thermal paste to lower the CPU temps.

Cpu Fan Error Fix 2 –Reduce the default RPM of the fan.

Many users reported that lowering the BIOS default fan RPM solved their CPU fan problem on boot.

For this, you need to follow the instructions that are given below.

  • After restarting your computer, press the F2, F12, or Del keys to access the BIOS panel.
  • After this, open the CPU Fan Settings. The most important thing to remember is to seek the CPU Fan control choices in the Advanced settings menu, which may change depending on your motherboard.
  • Look for the RPM warnings setting, which should be around 600 RPM by default (Rotations per Minute).
  • Then set the default to 300 RPM and save your changes.
  • Last but not least, exit BIOS and restart your computer.

Cpu Fan Error Fix 3- It’s Time to Clean Your CPU Fans

Inspect and clean the computer’s CPU fans if the previous steps do not address your problem. It’s a good idea to wipe the dust entirely, but don’t forget to clean the other components as well.

CPU Fan Error Fix

To clean the fans and other components, use a soft, moist cloth and a damp cloth to wipe the case’s bottom. Users can also clean the fans and other components using a cotton swab soaked in isopropyl alcohol.

This will resist your computer from overheating and will also resolve the issue with the CPU fan speed.

Cpu Fan Error Fix 4-Make sure your CPU fans are adequately connected.

 There are usually a couple of CPU fan connection ports on the computer motherboard, allowing users to simultaneously connect many fans of various types.

Furthermore, the ports for your CPU fans are remarkably similar to those for other computers. Due to this, Sometimes the users install the CPU fans wrong.

However, if you disconnect your fans there, don’t worry. Remove it and observe what happens when you connect them to other ports.

Cpu Fan Error Fix 5-Reconnect your CPU fans properly.

There are several CPU fan connection connections on the computer motherboard that allow you to connect several fans of various sorts simultaneously. Likely, customers will inadvertently insert the CPU fans because the ports for other components are identical to the docks for CPU fans.

As a result, it is advised that you inspect the fans and remove them and connect them to other access ports if they are mistakenly placed.


What exactly does “CPU fan error” imply?

A typical error message that happens at the exact moment is the CPU fan error. When your computer stops down due to CPU overheating, you’ll notice this issue.

What causes a CPU fan to stop working?

The primary source of concern is CPU overheating, which, if ignored, can cause irreversible damage to the processor.

What are the real symptoms of a failed CPU fan?

Sudden rising or lowering in the temperature of the PC may indicate a failed CPU fan.


The CPU fan trouble is a standard yet inappropriate error message. Now that you know why it occurs take the necessary precautions to avoid the problem in the future.

After that, any issues with the CPU fan fault on the boot should be rectified. Take your computer in for diagnostics and repair if the problem persists. You might also replace the more remarkable, which is a simple procedure.

Stephen Smith
Hi, I'm Stephen Smith. I love traveling, computer hardware, and software. I’m constantly trying to learn new skills and programming languages. Reviewing new pieces of hardware is one of my favorites hobbies. Drop by any time to leave me a message if you have any questions.