Mr_Geek
2 Bronze

[FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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I recently bought a dell XPS L502x, I also had the same problem with the fan speeding up to full speed for a few seconds, then off again, then on again, then off again. I am using windows 7 home premium. This is only a issue on Windows, Ubuntu seems to work without any problems.

I have figured out a simple fix, seems to have worked so far and my fan just stays on at a slower constant speed. My CPU temps have stayed constant and within range.

1. Click the `charging` icon in your taskbar (By the clock) [The little power plug]

2. Click on `more power options`

3. Under the power setting you are using (Balanced in my case), click on `Change plan settings`.

4. On the change plan settings screen, click `Change advanced power settings`

5. Scroll down to `Processor Power Management` > `System Cooling Policy` (Expand them both to view the options).

6. Under `System Cooling Policy` > Change `On Battery` & `Plugged In` to `Passive`.

and... Tada!....The settings should take effect immediately, if they don't, a reboot should do it.

That's It! The constant fan ramping up and down will be fixed, and will just stay at a constant speed now!!

Hope this helps someone, cos it dam well annoyed me, I mean I bought a £750 laptop, Dell could have at least configured it properly to reduce wear and tear on the laptop.

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Mr_Geek
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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No answer required, it has already been posted. Unless you have a better solution, id love to hear it. Thanks!

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joloriquelme
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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I just signed in and post beucase I have the solution to this problem. After months, even installed Windows 8, the problem remained, until... do the following.

With the computer off, blow on the ventilation slot, as hard as you can, with your own mouth.

Yes, I'm not kidding. Blow many times, (and close your eyes and don't breath because a lot of dust will jump).

Then, try.

It will work like magic. At least for me it was the case.

Jolo.

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JoshiKV
2 Bronze

RE: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Thanks joloriquelme.


What you suggested worked for me. I am sure this must be the root cause for all the people facing this issue. Everybody must try blowing air in to the ventilation inlets of the cooling fan. There is a small one just below the cooling fan. I found most of the holes were choked with dust. As soon as I blew air and cleaned it the 'on-off-on-off' cycle stopped. I also have applied the setting mentioned earlier but that did not work for me.

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Mr_Geek
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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No answer required, it has already been posted. Unless you have a better solution, id love to hear it. Thanks!

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unununium
3 Silver

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Do this have any adverse effect on performance? Will the fan still speed up when the processor is under heavy load? I'd like to try this but am worried that it may cause overheating?

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Mr_Geek
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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My fan still speeds up when it gets hot (I was playing games a minute ago, and it was going at full blast), now im back in windows surfing and sending emails, the fan stays at a slow speed.

So Yes, It seems that the fan will still speed up under heavy load,  (It just don't do it every 10 seconds like before).

unununium
3 Silver

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Great!! Thanks!

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Mr_Geek
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Also, I just ran a Prime95 (Torture Test), which maxes out the processor, and the fan went full blast straight away, you can download prime95  by googling it, and try it yourself if your still worried, The fix works great and does not stress your Hardware in anyway, when it gets hot, your fan will kick it at full blast to cool down your processor!...

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unununium
3 Silver

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Cheers mate. Looks like "passive" is the best setting. Thanks once again.

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Goal80
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Passive: This option will reduce the processor speed to reduce the temp. .. if after a while the temp. does not decreased, the fan will run.
So this option is OK if you don't mind having the processor working at reduced performance ... But less fan noise

Active: this options runs the fan to reduce the temp., if after a while the temp. does not decreased, then the processor will slow down to reduce the temps.
This option is the one for you if you need your processor working at the highest performance all the time... but more Noise

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Mr_Geek
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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Yes, I read that on the Microsoft site, I didnt see a huge difference on my PC in terms of speed, so worth the sacrifice (keeping the components that little bit cooler, might help extend the life of the laptop as well). But at least the fan is working as it should now!!

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Charles H
2 Bronze

Re: [FIXED] Dell XPS 15 L502x [fan on, fan off, fan on, fan off...] on Windows 7

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This solution does NOT work for me.  I have tried it, and the fan still constantly ramps up and down.  I have searched for weeks to try to solve this issue with no luck.  I've tried replacing drivers for both the nvidia and intel chipsets.   I have no special fan speed programs.  I have no hardware monitors that I am aware of.