Why Does My Laptop Fan Turn On

Laptops are made to be small and portable. Their slim shape makes them portable, but it also makes heat management difficult. The components on a laptop can quickly overheat due to their close proximity. To keep the components from overheating, the laptop must have adequate airflow.

Most laptops have one or more tiny fans to keep air moving around inside the machine. The fans are usually quiet and unobtrusive. However, when the CPU is nearing 100% or the battery is charging, it generates heat. The fans speed up to cool the laptop when the internal temperature sensors reach a certain level. Fan noise is often noticeable at high speeds.

What Should I Do If My Laptop Fan Doesn’t Work?

Under regular use, laptop fans exhaust air and emit a gentle to moderate audible sound. If the fan on your laptop is silent, the air near the vents is calm, and the laptop is extremely hot, the fan is most likely broken. Laptop cooling fans are essential for laptop longevity and functionality, and an overheated device performs poorly, if at all. To avoid hardware failure, make sure to replace a broken fan right away.  

1. Listen for noise

A properly functioning laptop fan sounds like a quiet propeller fan, but it may not be audible when you first turn on the computer because the fan is running at its slowest speed. As you continue to use your laptop, the fan speeds up to provide more airflow and cool the system; it will likely switch to a faster, louder mode after about five minutes when your laptop achieves its operating temperature.

The best-cooled laptops may feature exceedingly quiet fans that careful listeners can only hear in calm surroundings. If your fan makes irregular pulsating or loud screeching noises, it could be broken or obstructed.  

2. Feel for Air

You should be able to feel the air blowing out of the vents even if you can’t hear it. When you first power on the computer, the airflow may be pretty modest, but as the system reaches its average working temperature, the laptop fan should start expelling air from the central exhaust vent, which is usually placed on one of the laptop’s sides.

Feel for airflow with your hand approximately half an inch away from the vent, palm facing the system. The fan may be broken if the laptop is silent and there is no airflow. If you can hear the fan working hard but only get light airflow from the vents, the fan may be clogged; clean the vents with a compressed air blast.  

3. Watch for Errors

The fan may have an issue if the computer restarts without notice, slows down to a halt in regular operation, or gives you the infamous BSOD, or Blue Screen of Death. Because the fan is coupled to a heatsink as part of the cooling unit, there could be an issue with another portion of the unit even though the fan is blowing air. If the cooling unit becomes loose or the thermal compound that connects the CPU and the cooling unit wears out, your system may overheat.  

4. Check the Temperature

Even though the fan is blowing air through the vents, it may have a technical problem, such as a motor problem, that prevents it from adequately cooling your computer. If your laptop doesn’t display a temperature measurement when you turn it on, use a hardware monitor tool to check the temperature of the CPU.

The fan may malfunction if the application registers a continuous temperature of over 160 degrees Fahrenheit when your laptop is doing nothing.  

How to stop a laptop fan that’s running nonstop?  

Now that we know what causes a laptop fan to turn on, we can look at fixing one that won’t turn off.

Remember that hearing your laptop’s fan shouldn’t be a problem in most cases: it’s usually spinning constantly when you’re using it. However, if it is deafening and struggling, you may have a problem that needs to be addressed.  

1. Clean your laptop

One of the leading causes that might cause a laptop to overheat and, as a result, keep the fan running is dust. Internally, it would be best to clean your laptop regularly to ensure that no dust build-up could cause problems. Dust can cause more than just overheating issues; it can also short circuit your laptop.  

2. Check your processor’s utilization

Knowing which programs or tasks use your processor the most allows you to keep your fan from running constantly. In this manner, you can disable or limit the use of those programs or tasks.  

3. Adjust the Power Settings

When it comes to avoiding the fan from running all the time, it’s critical to set up a suitable power plant for your laptop based on your usage. To change your power settings, type “power settings” into your Windows taskbar and pick “power & sleep settings” as a result. This will open a new window where you may manage the power plans for your laptop.  

4. Clean your laptop’s air vents

Now it’s time to try something a little less technical but essential: cleaning your laptop’s air vents. If these are clogged, severe heat will build up inside since the air won’t circulate as it should, causing your fans to run constantly.  

6. Check for Windows updates

When it comes to updating our Windows operating system, fans go crazy since your laptop will do a lot of multitasking: it will download updates, extract files, and prepare them for installation in addition to anything else you’re doing.

Frequently Asked Questions

Following are some frequently asked questions related to why my laptop fan turns on.

1. Is it bad if my laptop fan is on?

Your fan is in perfect working order. That’s why, when he’s using it, the fan continues turning on and off. If you’re worried about your laptop heating more than it should, I don’t think you should be.

2. Why Is Your Laptop Overheating?  

Your laptop is overheating due to a lack of cooling. Dust clogging intake grills or exhaust ports, a clogged fan, or degraded thermal paste are possible causes.

3. Why is my laptop fan so loud but not hot?

If the fan is functioning, but little or no air is coming out of the vent, dust is most likely blocking the internal airflow. Blowing compressed air via the vents will usually clear any dust gathered on the inside of your laptop.  


The laptop fan is a crucial part of the laptop cooling system. When the laptop’s temperature rises, the fan will begin to spin. However, if the laptop does not run any software and the fan on the laptop is always on, the system setup may be to blame.

Steven Dane
Hi, I’m Steven a gaming enthusiast and blogger. I’ve been writing on Laptops for a long time its my pasion. On LaptopTrust.com I mostly recommend laptops that are best in their category and other various tweaks about laptops to help others. Have a question? Just leave a comment below on any post