Laptop's cooling fun speeds up speeds down constantly

[e_kurbanov]

Hello,

I have a brand new HP Probook 430 G3 which is working and performing just great, the only problem is its strange cooling fan sound.

The problem is that it speeds up and speeds down constantly without any visible reason. (Please note that its not a normal behavior when coolers change speed based on higher cpu temperature). The interval between speeding up and down is less that a second and it is constant. So just imagine when cooler runs on higher speed it's not smooth as supposed to be but kind of waving/floating. 

I'm not sure with speeds laptos fans run, but if visualize the problem it will look something as illustrated below 🙂

Steps taken:

• Updated the BIOS to the latest version - didn't help.

• Turnet the "Fan Always on while AC Power" - sounds same.

Can anybody suggest anything to diagnose the fan issue? Mayble there are some fan diagnostincs tools available or something else what can help. 

Thanks in advance for any suggestions.

[Huffer · Accepted solution]

I am going to say that is a hardware problem with the fan itself. You might try blowing it out with compressed air. There could be a dust clog or something that is causing it to drag, dislodging, then reclogging. Or the fan might be defective. 

I would make a warranty case or if you can return it for a replacement that would be a good idea, too. The Probooks are rather easy to work on and it is possible hP might just send you a new fan but I kind of doubt it. 

[sg123]

I've had an issue with erratic fan behaviour on my Probook as well, made a thread with no responses yet. Seems like a strange design fault.

[e_kurbanov]

Guys, thanks for you responses! I took the laptop to HP Service Provider and they suggested me to leave it there as indeed it looks like a hardware issue. Hope it wont take to much time to replace the cooler 🙂 

[primiq]

Hi, were HP able to resolve the issue?

I have exactly the same problem with the newer HP Probook G4 430!

Your post is actually a great explanation of what the problem is and I used it to describe the problem to HP, the laptop is currently with them for a repair. 

Its also a second one of these, the first one had exactly the same issue, it got replaced by a new one, with the same problem. So i thought i will give them a chance to fix this as it seems to be affecting a lot of models !