How to Troubleshoot Fan Issues

Before You Begin:

This article is a hardware reference companion to the Dell How to Prevent Overheating: Tips for Cooling Your PC or Laptop support library page. This article provides information such as how to troubleshoot and fix issues if the computer fan is not working, the fan noise is loud, the fan is spinning slowly issues. Before proceeding with these advanced steps, ensure that you have followed the steps on the library page.

Symptoms Addressed:

The following fan-related symptoms are addressed in this advanced troubleshooting guide:

• Fans in the desktop or laptop are making loud noise.
• Processor fan is making a loud noise.
• The fans in the computer run at high speed continuously.
• Computer is overheating because the fan is not working.
• Fans are not spinning or not working.

Understanding Fan Behavior — Key Facts:

Before proceeding, understand how Dell fans are designed to behave:

• Your computer may contain one or more fans to keep the internal components cool. Under normal working conditions, it is normal for a computer to generate a fair amount of heat and become warm to touch depending on usage.
• Excess heat can cause the fans to run faster and continuously, which can potentially damage internal components and reduce the performance of the computer.
• Fans that continue to spin quickly and make abnormally loud noises might indicate a problem.
• If the computer is not shutting down and the fan is passing the diagnostic tests, the fan running constantly can usually be traced to a heavy workload causing high CPU usage. This can be caused by Windows updates or any number of other open applications.

Common Root Causes

Common causes for fans not working, abnormal, or loud fan noise, and overheating include:

Common causes for fans not working abnormal, or loud fan noise, and overheating include fans or air vents that are obstructed or physical damage to the fans or air vents, which reduces air circulation. Blocked air vents can cause serious performance issues by restricting airflow — this can cause the processor, system memory (RAM), and other hardware to overheat, which may lead to potential hardware failure.

Excessive heat can also cause a significant decrease in performance, as most processors automatically reduce their speed to help compensate for heat-related problems.

If you notice the computer fan running constantly and making an abnormal or loud noise, this might indicate that the computer is not running as efficiently as possible and/or has clogged air vents. It is important to keep dust from accumulating in your computer and ensure adequate ventilation to help reduce heat. Lint and dust accumulation prevents air from flowing around the cooling fins and causes the fan to work harder.

Fan Types in Dell Computers

Your Dell computer might have multiple fans to keep the internal components cool. Desktops have more than one fan — a processor (CPU) fan and a fan on the dedicated or discrete video card (GPU).

Fan Types in Dell Computers

Proper placement of your computer is critical to preventing fan issues:

• Desktop computers — Place the desktop on a flat and hard surface in an upright position. Provide sufficient clearance in the front and back of the computer. If your computer has air vents on the bottom or side, ensure that there is sufficient clearance on all sides.
• Laptops — Place the laptop on a flat and hard surface where the bottom and side air vents are not obstructed.
  CAUTION: When laptops are placed on a mattress or other soft surfaces, the air vents may be blocked by the fabric, and leaving it there for an extended period leads to overheating issues quickly.

Advanced Troubleshooting Steps

Step 1 — Run a Full Dell SupportAssist Hardware Checkup

There are other factors that may cause the fan to run at a high RPM such as background processes or other hardware issues. It is recommended that you consider running a full hardware checkup using Dell SupportAssist. The Dell SupportAssist diagnostic test helps you troubleshoot a problem and get automated fixes.

If a hardware issue is detected, you may be guided to update drivers or contact Dell Technical Support for repair options.

To run a full hardware checkup using SupportAssist:

1. Type SupportAssist in the Search box, and open the application.
   NOTE: If SupportAssist is not installed, download it from the SupportAssist for Home PCs information page. Administrative rights are required for installation.
2. On the Home tab, select Scan Hardware.
3. Click Start.
4. After the diagnostics is complete, select check the History Page, and then select Details to review the results. Make note of any failures.

Step 2 — Run a Thorough Hardware Diagnostic Test (ePSA / Preboot)

For a thorough test of one or more fans in your computer, Dell offers an integrated diagnostic.

To run the preboot diagnostic test:

1. Restart your Dell computer.
2. When the Dell logo appears, press the F12 key to enter One-time Boot Menu.
3. Select Diagnostics, the Quick Test starts. If the test fails, ensure to write down the error code and validation code.
4. Select ADVANCED TEST. Clear the checkmark next to Select All.
5. Select all the listings for fans and then select Thorough.
6. Select RUN TEST.
7. If the test fails, ensure to write down the error code and validation code.
8. If the hardware test passes, go to the next step to try to resolve the fan issue.

See the Dell knowledge base article Reference Table of ePSA, PSA Error Codes, and Troubleshooting Steps (2000-0NNN Series) for information about how to look up the error code for additional help.

Diagnostic Tip: There is no dynamic control available during the ePSA tests — the processor runs at full speed during these tests, and the fans will likely go to high speed throughout the testing.

Step 3 — Disable Unnecessary Startup Programs

Many applications or software run in the background, in the system tray (also called the notification area). These applications usually launch during startup and run in the background but remain hidden. Preventing these applications from launching during startup will not only improve the performance of your computer but also help the fans run slower comparatively due to lesser load on the processor (CPU).

To disable startup programs in Windows 11, follow these steps.

1. Close all open windows.
2. Press CTRL + Shift + ESC key together on the keyboard.
3. In the Task Manager window, select Startup apps tab.
4. Select the program or application that you want to disable from loading during startup.
5. Right-click and select Disable.
6. Repeat Step 4 and 5 for all the programs or applications that you want to disable from loading during startup.
7. Restart your computer.

Frequently Asked Questions

Q: Why is my Dell fan running constantly at high speed?
A: Blocked air vents can cause serious performance issues by restricting airflow; this can cause the processor, system memory (RAM), and other hardware to overheat, which may lead to potential hardware failure. Excessive heat can also cause a significant decrease in performance as most processors automatically reduce speed to help compensate for heat-related problems.

Q: Can I use a vacuum cleaner to clean my Dell's vents?
A: No — vacuum cleaners can generate static electricity, which might damage internal components. Use compressed air instead.

Q: Can I use a cooling pad with my Dell laptop?
A: Yes, cooling pads enhance airflow and help reduce heat during prolonged use.

Q: What is thermal throttling?
A: Thermal throttling is a safety feature that kicks in when your computer's temperatures get too high. It reduces performance to prevent overheating and protect your hardware.

Q: What should I do if my laptop overheats immediately?
A: It is best to shut down your computer until it cools down to prevent any damage.

Related Articles

• How to Identify and Resolve Noise Issue on Dell Laptop PCs
• How to Stop Computer and Laptop Overheating and Shut Down Issues
• Identifying High Temperature, Heat, Thermal Concerns, Fan Noise on Dell Laptops
• How to Run a Dell Online Diagnostic Test
• How to Run a Diagnostic Test Using SupportAssist

Contact Dell Support

If all troubleshooting steps have been exhausted and the fan issue persists, contact Dell Technical Support to view support offers.