Fix Buzzing or Whirring Fan Noise

Introduction

If your computer fan is making a buzzing or whirring noise, this guide can help you identify the most common causes and try the recommended fixes. In many cases, the noise is related to trapped air in a liquid cooling system, fan or pump speed settings, or a warning condition from the pump itself.

Issue description

A buzzing, whirring, or similar mechanical noise from a computer fan may indicate airflow issues, an incorrect fan curve, or a liquid cooling pump that is not running at its normal speed. For liquid-cooled systems, the setting labeled fan control may actually affect the pump rather than the radiator fans.

Signs

• Buzzing, whirring, or rattling sound coming from the fan area
• Noise changes when the system is moved or laid on its side
• Noise becomes more noticeable under load or at startup
• Liquid cooling pump or fan appears to be running slower than usual

Basic troubleshooting steps

Start with these checks to rule out the most common causes.

1. Lay the system on its side for a while to help clear any air bubbles in a liquid cooling loop.
2. Check whether the noise changes after the system has been positioned horizontally for several minutes.
3. Open your fan or cooling software and review the current fan speed settings.
4. If the system uses liquid cooling, confirm whether the fan control setting is actually controlling the pump.
5. Set the fan or pump to maximum speed and listen for improvement.

Advanced troubleshooting steps

Step 1: Set the cooling control to maximum speed

If the buzzing or whirring continues, increase the fan or pump control to maximum speed in your motherboard software, BIOS, or cooling utility. On liquid-cooled systems, this can help the pump run at a stable speed and may eliminate warning noises caused by lower-than-normal pump operation.

Step 2: Verify whether the sound is coming from the pump

If your system uses an all-in-one liquid cooler, the noise may be a warning sound from the pump rather than the fans. Listen closely near the radiator and pump block to identify the source. If the sound persists even at maximum speed, the pump may need further inspection or replacement.

Step 3: Check for persistent warnings or abnormal behavior

If the noise continues after adjusting the cooling settings and repositioning the system, it may indicate that the pump speed is lower than usual or that the cooling hardware is not operating correctly. In that case, stop using the system if temperatures are rising and contact support for assistance.

Contact support

If the issue does not resolve after the steps above, contact CLX support for help diagnosing the fan or liquid cooling system. Be prepared to share your system model, cooling type, and a description of when the noise occurs.

Additional information

If you are unsure whether your system uses air cooling or liquid cooling, check your order details or product documentation. For the safest and most accurate diagnosis, do not disassemble cooling components unless instructed by support.

Conclusion

A buzzing or whirring fan noise is often resolved by clearing air bubbles, correcting fan or pump settings, or running the cooling system at maximum speed. If the sound remains, CLX support can help determine whether the pump or another cooling component needs service.