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One case fan not working sometimes

post #1 of 8
Thread Starter 
I have a asrock z87 extreme 4 motherboard and 4 case fans. Last week I noticed my case fan at the back stopped working. I reconnected it back to chassis fan 2 and it started working again. I have kept an eye on it since then. Today I booted the computer up again and it had stopped working again. It twitched once and would not spin. Reconnected and works again. I am wondering why this is occurring. Everything seems to be running fine and the fan makes no weird noices like it is failing.
post #2 of 8
Did you unplug it and then plug it back into the same fan header (Fan2)?

If you did then try plugging it into a different fan header and plug a different fan into Fan2.

If the fan does the same thing on a different header it is the fan. If the new fan plugged into Fan2 starts doing it then your motherboard has a faulty fan2 header.
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
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My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
4770K @ 4.7GHz / 4400MHz Asus Sabertooth Z87 Gigabyte GTX 780 OC 8GB G.Skill Trident X 9-11-11-31-1T @ 2400MHz 
Hard DriveOptical DriveCoolingOS
OS SSD 840 Pro 256GB / FSX SSD 840 Pro 256GB LG DVD Thermalright SB-E x2 Win7 Ult 64b 
MonitorKeyboardPowerCase
Viewsonic VP2655wb 25.5" IPS LCD Logitech Wireless EX1110 w/Mouse Corsair AX860i CM HAF-X 
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post #3 of 8
Thread Starter 
Yes I did plug it back into fan header 2. I will try switching them up and see what happens. It took 5 days for it to happen again, so I guess I will have to wait.
post #4 of 8
Thread Starter 
I wonder why it would do it every 5 days or so. It doesn't make since. I would think if it were a faulty header it just wouldn't work at all.
post #5 of 8
Is it a different brand or model than the others? It may have a higher minimum voltage. It may also have developed a higher requirement because it got stuff in it or simply got old. Some fans are cleanable, some are not. Either way you will likely eventually need a new one.
New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
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New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
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post #6 of 8
Thread Starter 
The computer is only 2 months old so the fan is almost new. It is one of the stock fan that came with the corsair 200r. Then I have two 2000 rpm fans that both run fine. Just started having problems with it last Saturday.
post #7 of 8
Have you tried to plug the fan in the PWR fan header?
This header will alway supply 12V then the fan should run always at full blast.

I hope only the fan is fault.
300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
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300R Rig
(7 items)
 
  
CPUMotherboardRAMHard Drive
Core I5 3570K Asus P8Z77-V LX Corsair Vengeance 8GB 1600 MHz DDR3 Seagate 2T 7200 RPM SATA 3 
Optical DriveCoolingCase
DVD R/W Sony Hyper 212+ Push Pull Corsair 300R 
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post #8 of 8
Thread Starter 
Yes I currenty have that fan plugged into pwr header, and the top fan plugged into chassis fan 2. Also I have a xbox 360 wireless receiver for my remote and I noticed that both times this happened the light went out on it, but it still functioned, just had no green light. So I have installed a different driver for that hoping to solve that problem. I am hoping these issues are not connected. As far as the fans, the connectors seem kind of cheap to me, flimsy. Upon disconnecting it I noticed that chassis fan 1 cord was overlapping chassis fan 2's cord and pulling down on it. I hope it was causing a bad connection or something.
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