CPU fan Error sometimes you can see the CPU fan error that appears during the boot process when you start your computer. A message from your computer’s BIOS that something is wrong with the processor fan.

While you don’t need to panic, this is an important error that needs to be resolved before continuing to use your computer. So let’s see how to fix the CPU fan error message.

What Is A CPU Fan?

The CPU or Central Processing Units are the “brain” of your computer. The CPU is the main unit that does the processing of numbers to keep your computer running. For this, electricity is used, and some of this electricity is converted into heat.

If the processor gets too hot, the circuits inside it will no longer conduct electricity properly and calculations will not be performed.

How To fix the CPU Fan Error?

In extreme cases, the CPU can get so hot that these fragile electronic components are destroyed.

To prevent this, the CPU has a head expander. This head expander is a metal plate that contacts the CPU and the other side is exposed to the external world. A radiator is placed on top of the radiator, usually made of aluminum and copper.

Between them is a thin layer of thermal paste that fills in any air gaps that may exist between two metal surfaces.

Heat is transferred from the processor through the heatsink to the heatsink. Then you need to cool the radiator itself. This is usually done with an attached fan that blows air through the fins of the heatsink.

Why Does The CPU Fan Error Occur?

There are two situations that cause a CPU fan error. Either something is wrong with your CPU fan, or your computer thinks it is.

One of what a fan may have a problem is that the fan is not enough to cool enough to cool the processor properly. Another thing is that the fan has completely stopped.

If you get this error after a forced shutdown, it is likely a real hardware issue. If your CPU fan was running very loudly before shutting down, this is a bad sign.

Again, your fan may be completely silent because it is standing still, which is not normal. Especially under load!

Some modern motherboards support stopping the fan when the processor is idle because it does not generate heat, but in general the fan should spin.

Fan speed errors mean that the advertisement fan speed does not match the expected of the computer, or it is out of the normal range.

Resolving CPU Fan Issues

If you want to know if a CPU fan is actually working, the easiest way is to see. We only recommend this for desktop systems as starting up your laptop partially disassembled is not a good idea if you don’t already know what you are doing.

If you’re fortunate enough to have a desktop with a side window, all you have to do is look into it to see if the fan is spinning. If you don’t, it is usually very easy to remove the side panel and watch while the computer is running.

How To fix the CPU Fan Error?

With laptops, you can simply hold your hand in front of one of the vents. If you have a model with both internal CPU fans and GPU fans, you may need to check the manual or online with the processor ventilation. If you can feel air coming out of this hole, then your fan is at least spinning.

If you want to get as much information about CPU fans as possible, download SpeedFan. This program monitors the temperature on your computer and allows you to adjust the speed of your fans. It also tells you whether the fan is rotating and the current speed (RPM).

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Is The Fan Connected Correctly?

This mostly applies to new builds of computers, but you have to check if the processor fan is properly connected. The CPU fan header (the connector on the motherboard to which the CPU fan is connected) is typically a label such as “CPU_FAN” on the motherboard and is next to the CPU header.

Sometimes system builders mistakenly plug the CPU fan into the system fan connector, leaving the CPU fan connector unused. This makes the computer think there is no fan at all!

For Water Cooled Systems

If your computer uses a universal water cooler, the water pump is usually connected to the system fan connector and the radiator fan is connected to the CPU fan connector. If this were accidentally reversed and the pump failed, you might also see a fan speed error.

Check BIOS

A CPU fan error usually stops the system during the boot process and requires you to enter BIOS first. You should definitely do this and pay attention to a few things:

  • Under the supervision of the system (or similar), check which fan speed is indicated in rpm.
  • If the BIOS has been reset, make sure the default fan speed settings or any fan speed settings match the manufacturer’s readings for your processor cooler.
  • If you know what you are doing, you can also set the BIOS to ignore the CPU fan speed in some cases. Do this only if there is a specific reason for it, such as a faulty fan speed sensor, even though the fan is working properly.

Check Other Fans

Make sure the other fans in your system are also plugged in and working properly. Without proper airflow in your case, the processor fan may not provide sufficient cooling, even when running at maximum speed.

Provide Adequate Ventilation

You should also make sure there is enough space around your computer for cold air to enter and hot air to exit. If the chassis is pressed against a wall or other flat surface, the air will have nowhere to go.

Clean Fans and Vents

How To fix the CPU Fan Error?

The same goes for the vents through which air must enter and exit the chassis. Make sure that all vents are clean and the fan itself is not blocked by dust or other substances that can interfere with the operation.

Disable over clocking and custom fan curves

If you’re over clocking your processor or tweaking a custom fan curve, remove those settings and reset everything to their defaults to see if that helps. Over clocking may require fan upgrades, and a faulty fan curve may not cool your processor properly under heavy load.

Replace CPU fan (or thermal grease)

If your PC fan is really stuck or your processor gets too hot even though the fan is spinning properly, you may need to remove it from the processor and inspect it.

If the thermal paste looks old, dry, flaky or cracked, clean it with isopropyl alcohol and reapply a pea-sized drop in the middle of the CPU heat spreader before replacing the heatsink.

If the fan itself is really dead, you can only replace the fan. However, it is more likely that you will have to replace the entire cooler. If you are still using the cooler that came with your desktop processor, this is a great reason to buy something better!

How Serious Is The CPU Fan Error?

In the worst case, your fan does not provide adequate cooling to your processor, in which case it keeps heating up. If it gets too hot, it will automatically shutdown the computer to prevent permanent damage, but even operating the processor below this critical point for extended periods of time can shorten its lifespan.

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