System Fan 90B Error: 3 Ways to Fix HP Cooling Fan

This is a fan problem, and it will cause your system to overheat

3 min. read

Updated onJuly 23, 2024

updated onJuly 23, 2024

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HP laptop users complain about loud fan noise and display the System Fan (90B)errorcode. This can be a serious issue and cause hardware damage if you don’t address it.

In today’s guide, we will take a closer look at this problem and show you the best ways to fix it, so let’s get started.

What is an HP System Fan 90B issue?

This fan problem is usually due to dust buildup on your fans and vents. The issue can also appear due to problems with outdated BIOS.

How do I fix System Fan error 90B?

1. Clean the air vents and CPU fans

2. Update BIOS

For more information, check our how touse the HP Support Assistantguide.

3. Perform a hard reset

How to bypass CPU fan error?

Keep in mind that disabling this feature can cause overheating and potential damage to your PC.

System fan 90B on an HP laptop is a fan issue; if it appears, you might experienceloud fan noise. On the other hand, many reported that thelaptop fan is constantly running.

If you’re having similar problems, we have a guide on what to do if yourCPU fan is not spinning, so you might want to check it out.

System Fan 90B Error: 3 Ways to Fix HP Cooling Fan#

How do I fix System Fan error 90B?#

1. Clean the air vents and CPU fans#

2. Update BIOS#

3. Perform a hard reset#

How to bypass CPU fan error?#