Burning smell from Noctua NFF12 fan. HELP

[AbeC916]

I was adjusting my radiator fan speeds in the bios yesterday, and began to get a burning smell from the PC. the monitor in the bois was showing a normal controlled ~1400rpm from my 2x NF-F12 iPPC 3000pwm fans radiator fans. found the smell was coming from one of them. It would spin up a little then stop. The fan motor was burning hot. I am using a noctua splitter. no signs of damage to the wiring. Disconnected the burning fan, took ou the splitter reconnected the working one. no issues. 

 

Did my motherboard just killed the fan, or do i just have a defective fan. Which ive had for less than 5 weeks? Any advise Thanx

 

Using a ASUS maximus formula viii with the lastest bios

[VinZie]

Is the part new?

[AbeC916]

Just now, VinZie said:

Is the part new?

less than 5 weeks old

[VinZie]

1 minute ago, AbeC916 said:

less than 5 weeks old

Let the fan cool down, then lower the fan speed. Tell me if it as hot as before.

[AbeC916]

Ill try that. Im going to plug it into a separate fan header. 

[AbeC916]

12 minutes ago, VinZie said:

Let the fan cool down, then lower the fan speed. Tell me if it as hot as before.

plugged into a different header, same thing. now the blades just twitch and the motor gets hot. 

Looks like i got a defective fan. crap

[VinZie]

Just now, AbeC916 said:

plugged into a different header, same thing. now the blades just twitch and the motor gets hot. 

Looks like i got a defective fan. crap

Indeed you do! Sorry to hear.

[W-L]

1 minute ago, AbeC916 said:

plugged into a different header, same thing. now the blades just twitch and the motor gets hot. 

Looks like i got a defective fan. crap

Sounds like the windings in the motors are shorted out if that is the case, open a ticket with Noctua they are very good at replacing any defective or bad units. 

[NoobCase]

They will replace it. 100% guarantied.