Cooking Fan not operating

[AN250]

My laptop is becoming overheated very quickly and whenever I open it now it comes up with a message saying the system has detected a cooling fan is not operating correctly.

The laptop itself has recently gotten very warm and yesterday when I was using it it turned off but has since turned on and does work but I haven’t been using it as much. 

It says System Fan (90B) and I am not sure what this means

[Deep_World]

Hi @AN250,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

Sorry for the inconvenience caused don’t worry let me help you.

To better understand the issue, could you please provide a few more details?

• What is the exact HP laptop model?
• How long has the fan error been appearing?
• Have you noticed any unusual noises from the fan, like grinding or rattling?
• Have you ever opened the laptop or cleaned the vents before?
• Does the fan error appear immediately on startup, or only after some use?

In the meantime, here are some steps you can try:

Basic Checks

1. Power cycle the laptop
   • Turn off the laptop completely, unplug it, and remove the battery if possible.
   • Hold the power button for 15–20 seconds, then restart.
2. Clean vents and fan
   • Dust buildup can cause fan failure and overheating. Use a can of compressed air to blow out vents.
   • Avoid opening the fan assembly if you’re not comfortable  it may void the warranty.

Software & BIOS

1. Update BIOS and drivers
   • Go to HP Support > Software & Drivers for your model.
   • Installing the latest BIOS can sometimes correct fan detection errors.
2. Check BIOS fan settings
   • Restart and enter BIOS (usually F10).
   • Look for a “Hardware Diagnostics” or “Fan Test” option to see if the fan spins.

I Hope this helps 

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?" Your feedback not only keeps us going but also helps others find the solution faster! 

Take care and have an amazing day ahead! 

Best regards,

Deep_World