Did I fry my 120mm fan?

[Goi]

Hi, I have a Nidec 120mm fan with 3 wires coming out of it(1 black, 1 red and 1 blue). I guessed that they were GND, 12V and fan monitoring wires respectively, but wasn't sure. So, I got an AC to DC power convertor that puts out up to 10.5V DC, and connected the red and black to the + and - of the convertor. Sure enough it worked. Then, feeling curious, I plugged the blue into + instead of the red...nothing happened. I reverted back to red and black and still nothing happened.

Now, it sometimes spins for a while(less than 5 seconds) and stops. Did I fry the fan?

 

[Goi]

nobody knows?

 

Ever cross terminals on a car battery
ehehehh
same deal

 

[beer]

Well on that blue wire come two pulses for every fan rotation.

You try to feet 10.5v DC into a line that is pulsing with the fan...not good...

You probably toasted it. Have a nice day

 

[Goi]

Thanks...I'll get it replaced then.

 

[Goi]

Got it replaced, but had to settle for a Nidec 58CFM unit instead of the original 112CFM unit
Oh well, the upside is that its a lot quieter(I barely notice its addition), and I don't need that much exhaust on top anyway...

 

[Ulysses]

Don't forget to RMA the defective one.

Worked for me.

 

[Goi]

Haha, wasn't neccessary. I just went back to the shop and got it replaced. Those fans are cheap here anyway.

 

[beer]

hahaa
I just want to know, how did you touch the fan connectors without cutting off the molex connector? If you cut it off...wouldn't that void the warrenty?

 

[Goi]

Elemental...there's no warranty on this thing. Its just a part I bought from a hardware/electronics store and the wires were bare, which is why I could test them. I had to buy separate molex connectors and put them on myself. Besides, who needs a warranty on a fan that costs like 7USD?