Laptop Tips

How To Fix Your Laptop Fan Always On

Laptop fan is an important component of the laptop cooling system. When the temperature of the laptop rises, the fan will start to rotate. However, if the laptop does not run any software at all, and your laptop fan always on, that may be caused by the system set up. Here’s how to fix a laptop fan constantly running all the time.

Method 1. Change system settings

Below I take win10 as an example to set up a laptop power management plan to reduce cooling fan speed and noise.
1. Windows 10 : Go to Start > Settings > System > Power & Sleep > Additional power settings additional powe settings

2. Click “Change plan settings” in the pop-up window.change plan settings

3. Click “Change advanced power settings” in the pop-up window.Change advanced power settings

4. Click “processor power management”, and click “System cooling policy” in the drop-down menu, then click “Active”, change the “active” to “Passive”, Click OK.

The setup is complete now. Then the fan will run as needed instead of running all the time.

Method 2. Clean the laptop fan

If your “system cooling policy” has been changed to passive and you have not run large software and the laptop fan constantly running all the time, you may need to clean the laptop fan because the fan and heat sink are dusty and its heat dissipation performance is reduced.

At this point, you will need to remove the bottom cover of the laptop, remove the laptop fan and heat sink, use a brush to clean the dust on the fan and heatsink fins. You need to remove the old thermal grease from CPU, GPU and heatsink, then apply the new thermal grease to the CPU and GPU to improve thermal conductivity. Visit laptop fan cleaning guidelines to learn how to clean your cooling fan.

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David Tian

David is the editor @ MyFixGuide. He loves technology, especially good at laptops and mobile phones. In his free time, he loves to take apart the latest mobile phones and laptops.

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  1. (Worked for me)

    I just wanted to sincerely thank you for such a concise and helpful guide! I dread looking up seemingly smaller issues like this because of all the fodder I usually have to sift through just to find some simple guidance.

    Anyways, appreciated more than you know! Thanks again.

    1. I didn’t see it either at first. Read it again to make sure you’re not missing something. I don’t have “Balance (recommended)” but I do have “Dell (Automatically balances)”. Maybe the wording is a little different on your laptop.

  2. Thank you for this. I’ve only had this laptop for a few weeks and didn’t even know how to boot it. I was streaming video, then turned the laptop off and put it in my pack. An hour later, I heard the fan running inside the pack and couldn’t turn it off, or the machine on. Your posting helped a lot. Cheers.

  3. When I open the advanced power settings panel, the only options I see are desktop background settings, sleep, display, and battery. Other than that it looks like the exact same panel, and I reached it by going through the exact same steps. Am I missing something?

  4. None of these worked for me. I even changed the thermal grease. The CPU fan still runs loud and all the time.

    1. This guide only applies to windows10, if your system is not Windows10, you may not find the options in the guide.

  5. I’ve set the cooling policy to passive, I’ve left the fan cleaner than a surgical ward, I’ve disabled every possible process that won’t crash my computer, I’ve uninstalled unnecessary apps, I’ve disabled ALL background applications, I’ve disabled windows update settings, I’ve tried Speedfan, and in my insanity, I even held a plastic iceblock under the vent for a prolonged period of time and the fan STILL…WON’T…STOP…
    I’ve looked through countless guides, and tried what seems like everything. I’m running windows 10. I don’t know what else to do…

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