Laptop Fan always at full speed

Hello all,

my laptop was getting too hot and I decided to open it and clean it(haven't done that in 5-6 years).I opened the cpu fan which had A LOT of dust in it and cleaned it. I also replaced the thermal paste on the cpu & gpu.

Now the temperatures are low (40-45C) but the fan always runs at full speed. Before the cleaning it run at full speed while I was playing a game and the temperatures were high.
Now even with 45C it runs at full speed.

Any suggestions on what to look? The laptop is a 4 year old HP dv5-1145ev running windows 7

Thank you
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Now why is it that you haven't actually posted what laptop it is, nor what OS you're running on it?

 

First post updated.
Thank you

 

If you’ve rechecked all the fan related software settings (BIOS, Power Plan, and Graphics) I’d guess you may have to redo the TIM. The 25w Intel P8600 should run very cool and given the notebooks age and Nvidia graphics, a new fan and a copper shim on the GPU (GF 9600M GT ?) couldn’t hurt.

Just a thought…. Dave

 

I have checked all of them. Also I tried various programs but none of them shows the fans RPM. Was it supposed to show it or on laptops that option is disabled?
Also what is the TIM that you said?

 

TIM = Thermal Interface Material = Thermal Paste = Arctic Silver, Ceramic, etc…

Fan RPM... Doesn’t normally show on HP notebooks. Others perhaps, but I’ve not seen any software either that presents fan RPM on these units.

Just a thought… but if you have a SSD installed, this could be part of the issue. Before I installed a Samsung 840 SSD in our old DV4t-1000 last year… you rarely heard the fan. Now, periodically, it will occasionally spin up to full speed with little or no load but then go back to idle after 4 or 5 minutes. It may exhibit this behavior twice in one day and then sometimes not do it for a week. The only thing I can figure is that the OS (Win 7 64) is trimming the SSD and causing a load.

Our DV4T with a 25w Intel P8700 and Intel Graphics idles near 30c in a 21c room. The Nvidia graphics on your unit adds substantial heat but if the fan was silent at idle before you cleaned it and it is now running full speed with no load then I would suspect that something is amiss in the heat dissipation department.. ie the fan, heat sink, and/or thermal paste (TIM).

Best, Dave

 

Thank you Dave,

if there was an issue with TIM then the temperatures wouldn't be higher? I get about 30-40C in CPU and 46-50C in GPU.
I noticed that when i power on the laptop the fan is louder but slowly reduces speed. But still, it was quieter before the cleanup.

note:I do not have SSD

 

There's also the option of the fan spinning the same way before as well, but due to the vents being clogged as you said, you may not have heard the airflow. The question is, what do you actually hear? Is it the mechanical whirl of the fan, or the fast movement of the air doing the cooling?

 

I think it's both, with the mechanical noise being more noticeable. I used a noise meter from my smartphone and the noise is about 40-44dB

 

Your temps look normal enough… though I think you could do a bit better with the GPU… dependent on room temps you’re experiencing. At-any rate, the mechanical noise sounds like the fan to me. This could be caused by an old fan, a fan that has been disturbed from its original installation point and has flexed a bit, or slightly different torques on the mounting screws (be there.. done that).

That said, if you’re going to go back a check/adjust any of that, I think I’d just get a new fan…use some new TIM on the CPU/GPU… and perhaps get a copper shim for the GPU. I did this to our old DV2700t with an Intel T8100 and a GF8400M GPU and the temp difference was about -3 on the CPU and -6c at the GPU. That’s a lot in my book.

Hope you figure it out. Best, Dave