PC Power Supply Fan Not Running– A Detailed Guide

Most power supply units have two fans, and depending on how well the PSU works, they both turn on at different times. Each fan is vital for the unit to work and keeps the case cool, which helps your other parts last longer. So, what will you do if you find that the pc power supply fan not running? If your power supply fan is malfunctioning, don’t panic; by the end of this article, you’ll know exactly what’s wrong and how to repair it.

First, let’s identify the most common reason why the PSU fan stops working, and then we can go on to fix the issue.



The following are the primary factors contributing to the power supply unit fan not operating.


If pc power supply fan is not running, the temperature inside becomes a big problem. When the computer gets too hot because it has to do more work, the PSU fan turns on to cool it down. So long as it works right, the fan won’t start until the system needs it. If the computer gets too hot when working hard and the temperature goes above 50 degrees Celsius, the power supply fan may be broken.


If the PSU fan doesn’t turn when the computer starts up, it could be because something is stuck inside the fan. Most of the time, the clog is caused by dust, dirt, or other particles. If you haven’t cleaned the fan in your PSU in a while, dirt and dust may have settled between its blades, stopping it from spinning and putting the whole system at risk.

Connection issue

If the fan can’t even turn ON, there might be a problem with how it’s connected. Make sure the power cord isn’t plugged in backward by checking it. Also, check the power line to make sure it isn’t broken. A broken power line could have more effects than just stopping the PSU fan from running. Also, this is a good idea to double-check that everything is wired correctly and safely.

Defective components

Most of the time, a bent blade is what goes wrong with a PSU fan. It could happen because of dust buildup, a broken part, or the fan’s normal wear and tear over time. Most of the time, you can realign and fix a broken part. Replacement because of its internal damage. Check the attached power supply fan, especially if you just set up the PC or moved it.

Power supply issue

Let’s say that at moderate loads, the fan in the power supply stops working. The problematic parts aren’t receiving enough juice from their power supply. Here, it’s essential to ensure that the power the fan needs and the power supply gives out is the same.

Defective PSU fan

The PSU fan may be beyond repair if none are at fault. It’s feasible that some or all of the hardware components is worming out. A malfunctioning power supply fan might be to blame if your PSU fan still won’t start when the load and temperature are high, even after you’ve cleaned it properly and ensured there are no obstructions.

Now that we’ve looked deeply into what’s causing the problems, let’s get right to the solutions.

How to Fix “PC Power Supply Fan Not Running”?

Here are some of the best methods to deal with this issue. Since this could be a hardware problem, the techniques mentioned could get expensive quickly, so we started with the cheapest ones.

Reduce PC Temperature

While getting a temperature of 50 Degrees, the temperature is close to controlling it. If this doesn’t happen, you should manually turn off the computer to keep it from getting too hot. One cause could be a broken or overheated fan in the power supply. To be safe, it’s best to have a professional look at the PC and check out the fan.

Fan Cleaning

Cleaning the fan and removing the dust and debris from its blades is a quick and easy task that won’t take more than a few minutes of your time. But it might be just what the fan needs to start working again.

Even a small obstruction can make your power supply fan work much less well. So, it’s essential to keep it clean regularly. Using a duster, a portable vacuum, and a lint-free cloth, you can clean every nook and cranny and ensure no dust or dirt is blocking the airflow.

Find Defective Parts

When you take the fan apart to clean it, you should also check to ensure that its parts are securely connected and fastened. Also, you should ensure that the power supply’s fan doesn’t have any broken parts. Look at the blade and the wiring, and if you see any damage or signs of wear, make the necessary changes.

Replace Defective Cables

No matter how important other parts of a computer system are, you can’t forget about the power supply cable. Hooking up the user guide and checking that everything is correct before starting the machine again. Changing the power supply for any problem is the right option no matter how much bigger the problem is. Your pet might have broken the cable by chewing on it.

Check Power Supply Capacity

If the power supply doesn’t deliver enough power, it will hurt the PSU fan and other essential system parts. If the power source you have now isn’t enough, you should either get a new one or make sure it gets enough power.

Replace the Power Supply Fan

Before you buy a new one, you should talk to an expert and ask them to test the power supply.

Frequently Asked Questions

How do I know if the fan on my PSU is running?

Activate the power supply unit (PSU). Watch if the PSU fan moves. If it does, the PSU is working as it should.

What can I do to fix my power supply?

Switch the power cable on the PSU with a cable you know works. Ensure the power supply’s cord and any internal power adapters while checking ports. Examine the power supply for any signs of damage caused by overheating. Also, Test the system with a known-to-work PSU of the same wattage or more.

Can dust damage PSU?

The dust is harmful to the parts inside it. It can cause the PSU and computer to get hotter and make the PSU work less well.


This article will give you more than enough information to understand “pc power supply fan not running” in depth. We’ve talked about everything we thought was vital for you to know. We also talked about what caused the problem and how to fix it. Knowing how to tell if a power supply is going is good. Ensure your computer is clean and has enough room for air to flow through it. That will make your life as a PSU fan better.

If you have any questions or comments, please let us know below. If there is anything we can do to help, please let us know.

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