Hp omen 15 (Ryzen 7) CPU fan stays always on once started

[Marwan221-_]

Recently i changed the thermal paste on my omen 15 en-0013dx since the factory paste was getting a bit old and needed to be replaced.

everything was fine and the cpu/gpu temperatures are way cooler now. all fine except for one weird issue. After changing the paste i noticed that the cpu fan starts around 45 celsius, and then it KEEPS GOING ON FOREVER. the cpu can reach temps as low as 29 degrees and the fan on the left side is still running at around 40% and making the annoying tinnitus sound which all omen laptops are known for. This is absolutely a new behavior since before changing the paste (and resetting the bios since the battery was disconnected) the fan used to kick around 45-50 but it would stop when it cools down to around 35, but now it literally stays on FOREVER. when I put the laptop to sleep or restart the fans turns off then kicks when around 45 then I get the same problem. I've done everything i can including:

- Updating all drivers including cpu/gpu, and checking for new hp drivers updates.

- Reinstalling the bios image

- Turning off fan always on setting in bios

- Windows 11 reset

Please help..

Thanks.

(UPDATE): sometimes I reinstall my AMD drivers, after that when the cpu fan starts it can sometimes turn off after about 15-20 minutes. But still sometimes it just keeps going on forever until I restart.

[erico]

What does the ambient temperature where you are using the notebook happen to be?

Why exactly did you change the original thermal interface material and what brand and type did you use?

Did you completely remove the old TIM with a solvent, such as the one that Arctic Silver sells, before you reinstalled the fans?

[Marwan221-_]

Hello,

ambient temperature here is around 30 degrees celsius, and I have the AC turned on most of the time so it's probably about 24.

The original thermal paste is about 2 years old and the laptop started to get a bit too hot while gaming, reaching 90-95. So I changed it with the Cooler Master Mastergel Pro. I didn't use any solvents, I just wiped the old paste off with a tissue (which wasn't much left of it on the contact plates). 

The CPU & GPU temps are both below 35 as i'm typing this reply right now, yet the cpu fan is running at 40%

Thank you.

[erico]

If the fan is running and the temps are below 35, then there may be something impeding the airflow.

How much TIM did you use?

You should have used a cleaner product after you removed the old thermal interface material.  That is my opinion. Its your notebook.

[Marwan221-_]

I didn't think using a solving was necessary, I hope this is not a big problem.

can you please explain more what something impending the airflow means exactly?

Actually I found out the next day that I might have applied a bit too much TIM on the CPU, but it wasn't overflowing on the motherboard or anything. I've taken a picture of it, I'll put a link below.

Could applying too much paste cause such problem? I didn't think soo at the time since the temps are very cool, it was driving me insane why the fans are still whining at 32 degrees. Also the fans and all the heat sinks are squeaky clean and don't look impended at all.

and if this might be the cause please tell me what should I do?

Should I remove the excess paste or even redo the whole thing properly with a solvent?

I use my laptop a lot of time on a pillow in my bed, I don't know if this could be what you mean by impending the airflow, But still the CPU are below 35.

Also btw I found out that the exact same problem happened a lot to other omen 15 users who didn't change TIM or anything, but still this problem happened to me right after I changed it.

https://drive.google.com/file/d/1z4NJXkk9nXUIWchMiFR-k3wg9rHVKjKX/view?usp=sharing (TIM picture)

(Update): I found out that when the fan starts and doesn't stop even at 32, if I set the fans to run at max (100%) in omen gaming hub for a minute or two until the temp reaches something like 28, then THE FAN STOPS. But only if it gets as low as 28.

Really appreciate your time.

Thanks.

[erico · Accepted solution]

Yes.

Applying too much paste could indeed be problematic.

I do suggest removing the paste and reapplying a smaller quantity in the center of the processor. Using a solvent like Arctic Silver produces would be a good plan.

Using the laptop on your pillow could actually impede the airflow.

Many of us use a laptop stand  to avoid impeding the airflow and keep the extra warmth from our laps. 

Here are examples of what I mean by laptop cooling stand

https://www.google.com/search?q=laptop+cooling+stand&client=firefox-b-1-d&sxsrf=APq-WBvo6D9Ncnb761hf...

[Marwan221-_]

Really appreciate the time you took to help.

Are you sure though that even the CPU temps are below 35 and the laptop vents feel almost freezing that the problem can still be with the TIM ?

I'll indeed get a solvent and redo the whole process with a proper amount of paste.

I'll keep you updated.

Thanks

[erico]

Thermal interface material does have some conductivity so if you used an excess amount it could indeed be the problem.

Cooler Master says "All of our thermal paste is non conductive. Please make sure you only apply a small pea sized drop before installation." Notice that there is a caveat in the second sentence.

 It is kind of funny. Oh, it isn't electrically conductive, but don't do this particular thing.   That is why I tend to not use their products.

[Marwan221-_]

You're a life saver, Thank you.

Just removed all the paste and re-applied it properly this time. I used a relatively smaller amount of paste (size of a rice grain).

Temps are as low as before, but now the fans stop when the laptop cools down, and don't start until temps reach about 60 degrees.

Again thanks for your time.

[erico]

You're welcome. 😊