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Top mounted case fan doesn't spin

Forum Index > Tech Support
Post a Reply
w.s
Profile Joined October 2010
Sweden850 Posts
September 01 2013 16:10 GMT
#1
So my top mounted case fan is not spinning properly, it sort of spins slowly, slows down and then picks up and then goes back and forth like that. I've recently cleaned it from dust but when I try to manually spin the fan I can feel that something's off. It feels kind of rough and it's not as easy to spin manually as my other fans. Visually I can't see what could be blocking the fan from spinning as it should.

Any ideas?
Cyro
Profile Blog Joined June 2011
United Kingdom20326 Posts
September 01 2013 16:16 GMT
#2
it sort of spins slowly, slows down and then picks up and then goes back and forth like that.


It doesn't spin when the CPU's hot?

That's exactly how fans react when they're just getting pwm signals or whatever to run at lower rpm, few fans just run on flat 12v controls for 100% all the time
"oh my god my overclock... I got a single WHEA error on the 23rd hour, 9 minutes" -Belial88
w.s
Profile Joined October 2010
Sweden850 Posts
September 01 2013 16:26 GMT
#3
On September 02 2013 01:16 Cyro wrote:
Show nested quote +
it sort of spins slowly, slows down and then picks up and then goes back and forth like that.


It doesn't spin when the CPU's hot?

That's exactly how fans react when they're just getting pwm signals or whatever to run at lower rpm, few fans just run on flat 12v controls for 100% all the time


The CPU fan works fine and so do the rest of my fans. I've 2 case fans, one mounted at the back and one on top. The top one doesn't spin properly. At boot, after a while and when shutting down. Doesn't matter when, it just simply doesn't spin. Right now it's BARELY spinning but I don't think it's some technical issue. It's more likely that something is stuck somewhere between the blades or something but I can't see it visually.
Myrmidon
Profile Blog Joined December 2004
United States9452 Posts
September 01 2013 16:37 GMT
#4
Included case fans are often pretty cheap sleeve-bearing models. Running them in that orientation makes them even more likely to die.

It could just need some light oiling (in the fan hub construction under the sticker and plug). Or if the bearing is actually bad, then there's not much to do. If the blades aren't stuck on something and it's not the connector being loose or something dumb like that, it's more likely one of these things.

A top fan not working isn't going to be the difference between a system overheating and not except in rare cases anyway, so you could just leave it alone. Or pay for a replacement.
w.s
Profile Joined October 2010
Sweden850 Posts
September 01 2013 16:47 GMT
#5
On September 02 2013 01:37 Myrmidon wrote:
Included case fans are often pretty cheap sleeve-bearing models. Running them in that orientation makes them even more likely to die.

It could just need some light oiling (in the fan hub construction under the sticker and plug). Or if the bearing is actually bad, then there's not much to do. If the blades aren't stuck on something and it's not the connector being loose or something dumb like that, it's more likely one of these things.

A top fan not working isn't going to be the difference between a system overheating and not except in rare cases anyway, so you could just leave it alone. Or pay for a replacement.


I think you're right. Been running my pc 24/7 for years and last couple of weeks the fan has not been working properly but I've not noticed any overheating considering I have one more case fan in the back.
Taipoka
Profile Joined November 2012
Brazil1224 Posts
September 01 2013 19:25 GMT
#6
On September 02 2013 01:47 MyXoMoPBL wrote:
Show nested quote +
On September 02 2013 01:37 Myrmidon wrote:
Included case fans are often pretty cheap sleeve-bearing models. Running them in that orientation makes them even more likely to die.

It could just need some light oiling (in the fan hub construction under the sticker and plug). Or if the bearing is actually bad, then there's not much to do. If the blades aren't stuck on something and it's not the connector being loose or something dumb like that, it's more likely one of these things.

A top fan not working isn't going to be the difference between a system overheating and not except in rare cases anyway, so you could just leave it alone. Or pay for a replacement.


I think you're right. Been running my pc 24/7 for years and last couple of weeks the fan has not been working properly but I've not noticed any overheating considering I have one more case fan in the back.

Just buy some ball-bearing - silent fans, like Akasa ones.
When a fan is dying, let it pass
And in the 7th day, Flash stopped macroing the universe.
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