I was getting same error message on my Maximus V Gene with Cooler Master 212 Plus CPU Cooler.

This error message is diplayed when CPU fan RPM is below specified limit. For my motherboard, specified low limit was 600 RMP and CM 212 Plus Cooler fan was running at 500-550RPM.

If CPU temperature is ok, then you need not to worry. If you want to turn of this error message, then goto:

BIOS -> Monitor -> Fan Speed Monitor

Here, you can see all fans connected to your system are being monitored. You now need to select CPU fan. Two options will popup - Monitor and Ignore. Select Ignore.

Error message will not be shown thereafter.

Answer from Yogesh Ralebhat on Stack Exchange
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Tom's Hardware Forum
forums.tomshardware.com › home › motherboards
[SOLVED] - How do I disable the CPU fan? | Tom's Hardware Forum
February 28, 2023 - Click to expand... Sorry about that. Since there isn't a fan you are going to get a post fault. With no fan connected to the cpu fan header go into your fan monitors (in bios) and on the cpu fan select "ignore" it should let you post.
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Tom's Hardware Forum
forums.tomshardware.com › home › components
[SOLVED] - CPU Fan Error on BIOS | Tom's Hardware Forum
June 28, 2020 - You say there is NO connection ... warning message. So, what MadsModsat said is the right solution - you must go into BIOS Setup and configure your CPU_FAN header to Ignore the fan speed signal (and warnings)....
Discussions

CPU fan error at boot up, how can I fix this?
If you are using liquid cooling like I am, go to advanced, then monitor tab at top. Then click option beside cpu fan speed and choose ignore. Then press F10 to save and exit. More on reddit.com
🌐 r/ASUS
843
298
October 8, 2022
CPU Fan Error - Republic of Gamers Forum - 127666
In BIOS, go to the Fan control section not the monitoring section. The CPU fan headers should be listed - should show "CPU Q-FAN Control - Enabled or Disabled", Enable that setting. Then you will see the setting below that is "CPU Fan Speed Low Limit", set that to Ignore. More on rog-forum.asus.com
🌐 rog-forum.asus.com
March 7, 2024
Is it dangerous to disable CPU fan check in BIOS? What can happen?
As long as your max temps are in the safe zone, you'll be fine And your pc will autoshutdown if the cpu gets too hot More on reddit.com
🌐 r/buildapc
4
2
January 18, 2021
CPU Fan Error, Everything Seems Fine. Help? - Republic of Gamers Forum - 156503
This is an issue with the fan not powering up to 100% before the bios expects it you can safely disable monitoring of the CPU fan in the BIOS to prevent this error i get it as well. in Advanced mode on the Bios click the Monitor tab then you will see the options for the different fans select ignore ... More on rog-forum.asus.com
🌐 rog-forum.asus.com
March 6, 2024
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MS.Codes
ms.codes › blogs › computer-hardware › asus-bios-ignore-cpu-fan
Asus Bios Ignore CPU Fan
February 14, 2024 - Access the BIOS settings by pressing the designated key during startup. Navigate to the "Hardware Monitor" or "Fan Control" section. Find the option related to CPU fan control. Change the setting from "Auto" to "Ignore" or "Disabled".
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Windows Report
windowsreport.com › fix › windows 10 › errors › cpu fan error on boot
How to Fix CPU Fan Error on Boot (Step-by-Step)
August 8, 2025 - Boot into BIOS. Navigate to the aforementioned Advanced settings. Look for the Monitoring (Monitor) section. Change the CPU Fan Speed to Ignore and confirm changes.
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Asus
asus.com › us › support › faq › 1006064
[Motherboard]Why I see the error message "CPU FAN Error" in POST? | Official Support | ASUS USA
July 7, 2023 - * "CPU Fan Speed Low Limit" appears only when you set the CPU Q-Fan Control to [DC Mode], [PWM Mode], and [Auto]. For those early versions, you need to set the CPU Q-Fan Control to [Enabled], [Advance Mode] or [Auto]. 4. You can set Monitor->CPU FAN Speed to [Ignore] if you don't want to open ...
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Reddit
reddit.com › r/asus › cpu fan error at boot up, how can i fix this?
r/ASUS on Reddit: CPU fan error at boot up, how can I fix this?
October 8, 2022 - Adding to this, I lost power during ... message prompting me to BIOS to fix the issue. Running an NZXT AIO, fans were running and PC wasn't overheating. Everything seemed fine. Just went to the monitor tab and switched CPU fan from N/A to ignore....
Find elsewhere
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Asus
rog-forum.asus.com › t5 › other-motherboards › cpu-fan-error › td-p › 127666
CPU Fan Error - Republic of Gamers Forum - 127666
March 7, 2024 - Raja@ASUS wrote: In BIOS, go to the Fan control section not the monitoring section. The CPU fan headers should be listed - should show "CPU Q-FAN Control - Enabled or Disabled", Enable that setting.
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OriginPC
support.originpc.com › hc › en-us › articles › 4404000823437--I-am-getting-a-CPU-Fan-Speed-error-on-boot-up-what-should-I-do
I am getting a CPU Fan Speed error on boot up, what should I do? – OriginPC
Navigate to the Monitor tab: Look for the Monitor tab and click on it. Set CPU Fan Speed to IGNORE: Locate the CPU Fan Speed setting and change it from N/A (Not Available) to IGNORE.
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MS.Codes
ms.codes › blogs › computer-hardware › how-to-disable-cpu-fan-in-bios-asus
How To Disable CPU Fan In Bios Asus
February 14, 2024 - This setting determines how the fan speed is controlled. Change the control mode from "Auto" or "PWM" to "Disabled" or "Ignore." This action will prevent the BIOS from controlling the CPU fan.
🌐
Lifewire
lifewire.com › fix-cpu-fan-error-4687270
Save Your PC from Meltdown: Key Steps to Tackling CPU Fan Errors
August 28, 2025 - If your CPU fan is working properly and you're sure your computer isn't overheating, this can bypass the CPU fan error and help your device run again. To do this, open BIOS and select Monitor > Fan Speed Monitor > N/A > Ignore.
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Reddit
reddit.com › r/buildapc › is it dangerous to disable cpu fan check in bios? what can happen?
r/buildapc on Reddit: Is it dangerous to disable CPU fan check in BIOS? What can happen?
January 18, 2021 -

Hello everyone,

My CPU fan doesn't spin up fast enough, resulting in an annoying error message at every boot, for which I have to press F1 to continue.

This is a problem with the fan model I'm using, because it's brand new. I tried multiple and I read people online having the same problem. So I cannot change anything about that. Everything is fine once the system booted: The CPU fan is just a little slow to start.

So in the BIOS there's the option the set the min amount of RPM on which the warning on boot up is triggered. Unfortunately it doesn't go lower than 200 RPM, otherwise I'd have set it to 100 RPM which would solve the problem, but the option isn't there. It's an Asus M5A78L-M LE AM3+ motherboard.

So the only way to get rid of this error message is by disabling the CPU fan check in the BIOS completely.

I was wondering: Is it dangerous to disable this check in the BIOS to get rid of the error message? What will happen when I turn on the PC when the CPU fan doesn't spin at all one day? Will it damage my CPU, or are there other safety measures in place?

Thanks for reading!

🌐
Corsair
corsair.com › explorer › diy builder › how-to's › how to fix a cpu_fan error?
How to Fix a CPU_FAN or CPU Fan Speed Error | CORSAIR
June 18, 2024 - After confirming "OK", your PC will restart and no CPU_FAN error message will be displayed.
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Quora
quora.com › How-do-I-disable-a-CPU-fan-error-on-ASUS
How to disable a CPU fan error on ASUS - Quora
Answer (1 of 2): First of all,this answer aims to solve 2 Issues namely 1)CPU FAN ERROR 2)CPU OVER TEMPERATURE ERROR Look into your cabin and check whether your CPU fan is working or not .If its working and the error still shows up in boot time then do the following Step1: Enter the BIOS scre...
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MakeUseOf
makeuseof.com › home › windows › try these fixes to solve cpu fan errors
Try These Fixes to Solve CPU Fan Errors
July 22, 2024 - A quick workaround is to connect the AIO pump to the CPU_FAN header instead and the radiator fans to the other fan headers in your motherboard. However, if you would rather use the dedicated AIO_PUMP header (as recommended by some cooler ...
🌐
PC Guide
pcguide.com › cpu › how-to › fix-fan-error
How to fix CPU fan error - 8 methods - PC Guide
April 22, 2024 - In some cases, you may need to disable the fan speed monitor entirely to fix the CPU fan error. For this, go to Monitor in BIOS, select Fan Speed Monitor and set it to ‘Ignore.’ While this may fix the problem temporarily, it can also start causing overheating issues after some time as your system will be unable to detect the fans.
🌐
Wikihow
wikihow.com › computers and electronics › computers › computer hardware › cpu fan error: causes & how to fix it for your computer
CPU Fan Error: Causes & How to Fix it for Your Computer
October 17, 2024 - If you have a liquid cooling system, it can't be detected by the BIOS, resulting in a CPU fan error popping up every time you turn on your computer. To fix this, enter the BIOS/UEFI, go to Monitor > CPU Fan Speed, and select Ignore.
🌐
MiniTool Partition Wizard
partitionwizard.com › home › partition magic › quick fix: cpu fan error occurs when booting your pc
Quick Fix: CPU Fan Error Occurs When Booting Your PC - MiniTool Partition Wizard
September 7, 2023 - Step 1: Reboot your computer. Press F2, F12 or Del buttons to enter the BIOS page. Step 2: Click on Power tab and highlight Hardware monitor option from the pop-up list. Step 3: Choose CPU Fan Speed Lower Limit option and change it into Ignore.
🌐
Asus
rog-forum.asus.com › t5 › other-motherboards › cpu-fan-error-everything-seems-fine-help › td-p › 156503
CPU Fan Error, Everything Seems Fine. Help? - Republic of Gamers Forum - 156503
March 6, 2024 - This is an issue with the fan not ... i get it as well. in Advanced mode on the Bios click the Monitor tab then you will see the options for the different fans select ignore for both CPU and CPU optional....
🌐
CGDirector
cgdirector.com › home › troubleshoot & fix › how to fix the “cpu fan error!” message
How to Fix the "CPU Fan Error!" Message
December 13, 2022 - To alleviate the issue, you will need to reduce the “CPU Fan Speed Low Limit” option in the BIOS. You can find this option by going to the “Monitor” tab, then to the “Q-Fan Configuration,” and then under “Q-Fan Tuning” where ...