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Fan Issue. Not starting on boot. Needs a push.

post #1 of 9
Thread Starter 
So, one of my fans (mounted vertical) isn't starting on boot. It needs a bit of a push. This, of course, is unacceptable as I don't want to have to open my rig every time I turn it on to push start a fan.

Are there any tips or ideas to get the thing working a bit better. Graphite, Silicone Lubricant, etc? I don't want to ruin the fan, so I'm not brave enough to randomly try things out without asking here first.

Thanks guys.
    
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post #2 of 9
What did you do to the fan? What noise does it make when it runs?
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post #3 of 9
Thread Starter 
Nothing actually. It's more or less 4 days old. Its smooth and quiet at full speed when it runs. Just when I start up, it doesn't start spinning. It doesn't take much to get it going, just like a tap.
    
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post #4 of 9
Quote:
Originally Posted by nyates;14656089 
Nothing actually. It's more or less 4 days old. Its smooth and quiet at full speed when it runs. Just when I start up, it doesn't start spinning. It doesn't take much to get it going, just like a tap.

You might need to oil it. Either that or just RMA it.
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post #5 of 9
Quote:
Originally Posted by nyates;14655962 
So, one of my fans (mounted vertical) isn't starting on boot. It needs a bit of a push. This, of course, is unacceptable as I don't want to have to open my rig every time I turn it on to push start a fan.

Are there any tips or ideas to get the thing working a bit better. Graphite, Silicone Lubricant, etc? I don't want to ruin the fan, so I'm not brave enough to randomly try things out without asking here first.

Thanks guys.

I suspect that fan is not being fed with enough juice. When a fan starts, it needs extra voltage to spinup. When it is spinning, it needs less.
So, this might explain why it can spin nicely and smoothly after you give it a little push on boot.

Check the rating of the fan header of the motherboard or fan controller that this fan is connected to. And spread the load out.
Edited by windfire - 8/20/11 at 8:07pm
post #6 of 9
Try plugging the fan in elsewhere. PSU/Molex, for example.

BTW - what kind of fan is it? And on what is it mounted? Case? CPU cooler?

Item 3 in my sig covers lubricating a fan, but that assumes you have a fan that works.

Another thing to try is going into Fan Xpert on your super- consumer-oriented As.s mb and disabling the automatic fan control on whatever header you are using. Those As.s boards can get complicated, so you might have to mess around a bit. (Meh. Between this mb I have and an As.s monitor I bought I'll probably never buy an As.s product again. Pfaugh!)
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post #7 of 9
Thread Starter 
I have it plugged in to the PWR header on my Mobo... Ill try to switch it to something else...

I switched it to the CPU header and it spun up fine. Only tried it once so far, but it's 1 for 1 at least. It looks tacky imo having a 3 pin fan in a 4 pin header, but I suppose I'll live. I'm going to hope that did it and I am just an idiot for putting it into the PWR header in the first place.
Edited by nyates - 8/20/11 at 4:49pm
    
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post #8 of 9
try switching to something else like directly into the power supply
   
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post #9 of 9
Quote:
Originally Posted by nyates;14656798 
I have it plugged in to the PWR header on my Mobo... Ill try to switch it to something else...

I switched it to the CPU header and it spun up fine. Only tried it once so far, but it's 1 for 1 at least. It looks tacky imo having a 3 pin fan in a 4 pin header, but I suppose I'll live. I'm going to hope that did it and I am just an idiot for putting it into the PWR header in the first place.

As you are using the CPU_FAN header, if you have fan speed problem again, make sure you have the CPU Smart FAN Mode disabled in the BIOS' PC Health Status so that the fan will run at full speed all the time. (This feature is enabled by default.)

An alternative to the 4-Pin CPU_FAN header is the 3-Pin header SYS_FAN2. It should also be able to supply enough juice to spin up the fan. If this header is used, set the System Smart FAN Control in BIOS to 'Disable' to have full fan speed.
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