When applications open, or are processing information you may see spikes in CPU utilization which is normal. Anything consistently higher than 10% will cause the fan to run in order to control the thermal temperature of the CPU. Generally the CPU Utilization is 1 to 14%.

When task manager opens you may have to select more details to see more detailed information. Here is information on how to check the CPU Utilization.ĬPU Utilization can be checked by opening task manager by right clicking on the windows task bar and selecting Task Manager. It is always a very good practice to keep the ventilation open underneath the laptop by placing the laptop on a hard surface so the air intake vents are clear of obstructions and the output vents on the back or side are also unobstructed However, when the application that is causing high CPU utilization is finished (whether it be updating, scanning or simply processing) the CPU utilization and as a result thermal temperature will stabilize back down after time. The fan may run constantly when CPU utilization is running high.

It is normal for the fan to run when the CPU thermal temperature rises and on today's thin and light designs the fan will run more often due to the compact design.

When CPU utilization runs high the CPU gets warm and the fan will run to control the thermal temperature of the CPU. Most causes of the Laptop fan running constantly can be traced down to high CPU utilization caused by Windows updates or other applications. If the fan on your Toshiba laptop is running loud or you notice performance issues, this article will walk you through some common causes and how to identify them. Information to help understand why the laptop fan may be running

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