If the fan header is fitted and soldered properly and then also it is not getting voltage, then there are a couple of things that you can do. If it is due to bad soldering, then you can solder it back if you have done soldering before and are not a stranger to it. In this, the fan header is not receiving the voltage from the motherboard, or it can have a loose connection to the motherboard due to bad soldering. Faulty Fan HeaderĪ faulty fan header is one of the most serious cases of the ‘CPU Fan Not Spinning,’ problem. Sometimes a broken wire at the fan side and also at the connector side can also cause this problem. The first thing to check is whether the 4-pin CPU Fan connector is inserted properly in the 4-pin CPU header, and there are no loose wires either on the connector or the fan side. CPU Fan Not Spinning īelow are the various causes and solutions for the ‘CPU Fan not Spinning’ problem. Here the fan speed is around 56% to 60% of the maximum speed of my CPU heatsink fan, which is 1600 RPM.
Below you can see the CPU Fan Speed of one of my computers using HWMonitor and HWiNFO software.Ībove, you can see that the CPU fan is spinning at 900 to 1000 RPM at a moderate load. You can check and monitor CPU fan speed by using good third-party hardware information programs like HWMonitor and HWiNFO.
So, here I am going to list the various causes of the ‘CPU Fan not Spinning’ problem and also provide you the solutions to fix it. Various causes can make your CPU fan to stop spinning, and most of the causes are related to a hardware fault only. Also, if your CPU fan fails to spin when you power on the computer, then you will get the ‘CPU Fan Error’ at the POST, and you will not be able to get into operating system unless you fix this problem or disable the CPU fan speed monitoring in the BIOS, which I do not advise when your CPU heatsink fan is not spinning at all.