Acer Aspire 5 A515 Fan Always Running Windows 11

The fan on your Acer Aspire 5 A515 runs at full speed constantly – even when you are just browsing the web or reading documents. This drains the battery faster and the noise gets distracting quickly. The most common cause is a missing or outdated ACPI thermal driver combined with an aggressive Windows 11 power plan.

This guide shows you how to fix persistent fan noise on the Acer Aspire 5, from updating the thermal driver to adjusting power settings and CPU performance limits.

“My Aspire 5 fan would not stop running since I upgraded to Windows 11. Checked Task Manager and nothing was using high CPU. Turned out to be the missing ACPI thermal driver.” – Syafiq, university student from Shah Alam

Why the Fan Runs Continuously on Acer Aspire 5 in Windows 11

The Acer Aspire 5 A515 uses an ACPI-based thermal management system. When Windows 11 installs a generic ACPI driver instead of the Acer-specific thermal driver, the fan controller defaults to maximum speed because it cannot read temperature data correctly. Another cause is rogue processes keeping CPU utilization high.

• Missing Acer ACPI thermal or fan controller driver after Windows 11 install
• Windows 11 High Performance power plan keeps CPU above 85% frequency at all times
• Background process (Windows Update, antivirus scan, browser extension) causing high CPU
• Dust blockage in vents causing genuine overheating and fan response

Fix 1 – Install Acer ACPI Thermal Driver

Go to acer.com/support, enter your Aspire 5 A515 model number, and download the ACPI Driver or Thermal and Fan Controller package for Windows 11. Install it and restart. The driver adds correct temperature sensor communication so the fan controller knows when to slow down.

Fix 2 – Switch to Balanced Power Plan

Press Win + R, type powercfg.cpl, and select Balanced instead of High Performance or Maximum Performance. If you are using Acer Care Center, open it, go to Battery – Charge Mode and set it to Standard. In Power Management, select Normal instead of Extreme Performance.

Fix 3 – Check and Kill High-CPU Processes

Open Task Manager (Ctrl + Shift + Esc), sort by CPU column. If any process is consistently above 10-15% on idle, right-click and select End Task. Common offenders include Windows Module Installer Worker, SearchIndexer, and antivirus real-time scanners during scheduled scans.

Fix 4 – Set Maximum CPU Frequency Limit

In Power Options (powercfg.cpl), click Change plan settings – Change advanced power settings. Expand Processor power management – Maximum processor state. Change it from 100% to 80% on Battery and 90% on Plugged in. This prevents the CPU from boosting to full frequency on light workloads, keeping temperatures lower and fan quieter.

Frequently Asked Questions

Why is the fan always running on Acer Aspire 5?

Usually a missing Acer ACPI thermal driver or a process keeping CPU usage high. Install the thermal driver from Acer Support and check Task Manager for CPU-heavy processes.

How do I stop Acer Aspire 5 fan from running constantly?

Update the Acer thermal driver, set power plan to Balanced, and check Task Manager for high CPU processes that elevate temperatures.

Is it normal for Acer Aspire 5 fan to always run?

No. On idle the fan should be mostly silent. Constant fan noise points to a thermal driver issue or an incorrect power plan.

What ACPI driver controls fan speed on Acer Aspire 5?

The Acer ACPI Fan Controller driver under System Devices in Device Manager. Download the latest from Acer Support for your A515 model.

Conclusion

Persistent fan noise on the Acer Aspire 5 A515 in Windows 11 is most often caused by a missing ACPI thermal driver or an aggressive power plan. Installing the correct thermal driver from Acer Support and switching to Balanced power plan resolves the issue for most users. If the fan still runs after these fixes, check for high-CPU background processes in Task Manager.