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Author Topic: Computer fan running nearly constantly.
Casey, making hot chocolate
Let There Be PCs on Earth


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For the last few weeks, my computer's fan has been running nearly constantly. I tried a defrag and a ChkDisk to calm things down, but no dice. There's not an unusual number of processes running, I dont think- about 40- but that's normal for me.

Any ideas? Nothing seems to trigger it, it just goes on and off at will.

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Elbe
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Presumably you have an auto changing case fan, right? If the sensor says it's hotter than it should be (like say when it's idling) then maybe the ventilation isn't working properly. Does the case and it's vents need to be cleaned?

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Casey, making hot chocolate
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I can try that. [Smile]

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"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
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Elbe
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In reality your case fan should be on constantly anyways to keep the airflow moving. I'm guessing it's just been running louder than usual. So either it's running faster than it was, in which case it's not cooling properly and it all should be cleaned out, or the fan has just gotten noisy and a replacement might be in order (if the noise bothers you).

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El Chupacabra
I Saw Three Shipments


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I would suspect it might be a process that is taking too much of your CPU time. What I would do is when you first launch your computer, launch the task manager by CTL ALT DEL, go to options, select Hide when minimized and then minimize it, it will minimize to your system tray and give you a handy CPU meter. See if your fan going on coincides with the meter going "full" if so, launch the task manager by double clicking on the task bar icon and then sort by CPU and see what process is running high, then take appropriate measures.
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Em
Happy Holly Days


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A site I've found useful for sorting through what should and shouldn't be running is processlibrary.com. It probably won't help you work out why your fan is running fast, but it's great for identifying malware and, more importantly IMO, what isn't malware. Some legitimate processes have really weird names.

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Troberg
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Most likely, it's dust clogging the air flow. Don't you clean the insides of your computer every day?!?!?!

Could also be a task running wild, but then you would problably notice the computer running slower.

The fan could also be going bad. As the bearings are worn out, they make more noise and run slower, which means that it has to run more often. Stick your finger in the fan (don't worry, it will not hurt), if it feels like it lacks "oompfh", it's bad even if it spins.

I'd say replace the fan. They are cheap and it's not really worth the trouble searching for other problems until you've tried a new fan. If a new fan doesn't work, you'll have a spare which you'll need sooner or later anyway.

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Casey, making hot chocolate
Let There Be PCs on Earth


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Well, I popped off the side and did some investigating. There are two fans, and when it runs loud, both are running. When it is silent, one is kicked into a higher gear, it seems. There isn't a correlation between CPU usage and fan running, so I guess I should clean the fans out.

Right?

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"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
Countdown: 177 days and counting... or less. My blog. 14 keyboards owed.

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Grand Illusion
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Make sure that your fan is mounted completely tight and than none of its mounting braces are broken. I don't know what kind of PC yours is, but the HP DC5000's we use have their CPU fan tightly clipped against the processor using four plastic mounting clips. If even one of those mounting clips breaks and causes the fan to become even slightly loose, the temperature sensor will cause the fan to run.

To test this, manually press the fan as tightly against the processor as you can, and see if the fan goes back to normal operating speed.

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Casey, making hot chocolate
Let There Be PCs on Earth


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Right on cue, the internal fan kicked into high gear. I checked, and it's solid as a rock. Now to get some compressed air.

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"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
Countdown: 177 days and counting... or less. My blog. 14 keyboards owed.

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abbubmah
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What type CPU? I have an AMD laptop that ran too hot, "laptop uncomfortable", and found a CPU driver on AMD's website that throttles CPU speed and voltage based on process demand. Works like a charm!

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STF
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I would also make sure your BIOS is up to date. A particular model of Dell I work on will start running the fan constantly and getting hot if it has the wrong BIOS revision on it.

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El Chupacabra
I Saw Three Shipments


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Also, is it hot where your computing? Is it a small room? I can tell you my fan kicks into high gear if it get's hot* in the room especially during the summer time.

*Say above 80F.

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Casey, making hot chocolate
Let There Be PCs on Earth


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quote:
Originally posted by abbubmah:
What type CPU? I have an AMD laptop that ran too hot, "laptop uncomfortable", and found a CPU driver on AMD's website that throttles CPU speed and voltage based on process demand. Works like a charm!

Not the slightest clue as to the CPU, unless you mean processor- AMD Athlon XP at 2.2 GHz.

I hosed it out with compressed air, and it seems to have worked. Computer now just has the light whir I'm used to. [Smile]

Just kicked up again, and now the System Idle process seems to want to take a lot of the CPU usage- right now at 97%. What's with this?

--------------------
"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
Countdown: 177 days and counting... or less. My blog. 14 keyboards owed.

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abbubmah
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Ok, go here and download the Power Now utility. If it is another CPU, like a 64, go to their drivers section and get the CPU driver or appropriate power monitoring software for that processor.

I have an AMD 64, and usually leave it on laptop mode unless I need full speed for a game.

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Casey, making hot chocolate
Let There Be PCs on Earth


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I tried, and it won't download on an XP box. Is there an XP version?

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"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
Countdown: 177 days and counting... or less. My blog. 14 keyboards owed.

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me, no really
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quote:
Originally posted by Casey, off the deep end:
Just kicked up again, and now the System Idle process seems to want to take a lot of the CPU usage- right now at 97%. What's with this?

The system idle process isn't really a running process as such. It is just counting how much of your CPU capacity is available. If the system idle process is at 97%, then it just means that you are only using 3% of the CPU capacity - 97% of the time it is doing nothing (idling). That means the system is not working hard at all.

me

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abbubmah
Ding Dong! Merrily on High Definition TV


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quote:
Originally posted by Casey, off the deep end:
I tried, and it won't download on an XP box. Is there an XP version?

this is the direct link to the windows utility.

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Fundamentally Unfundie since 1975

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Casey, making hot chocolate
Let There Be PCs on Earth


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Okay, it downloaded, but won't run under Windows XP. Ideas? [Smile]

--------------------
"To be or not to be! That is the question! Now, will you answer, dare, double dare, or take the Physical Challenge?" --Mark Summers as Hamlet
Countdown: 177 days and counting... or less. My blog. 14 keyboards owed.

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Troberg
Angels Wii Have Heard on High


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quote:
Also, is it hot where your computing? Is it a small room? I can tell you my fan kicks into high gear if it get's hot* in the room especially during the summer time.
The altitude can also be a problem. It caused my laptop to overheat when I was working in Amman (approx 1200 m above sea level).

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/Troberg

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abbubmah
Ding Dong! Merrily on High Definition TV


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quote:
Originally posted by Casey, off the deep end:
Okay, it downloaded, but won't run under Windows XP. Ideas? [Smile]

No. It appears to a be a windows program. Sorry.

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Fundamentally Unfundie since 1975

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