Arctic F12 fan wiring

I wired two fans together, one cheap chinese and one Arctic F12. First has red, black wires and second one has yellow, black and green.
So I wire both black together, and red-yellow together. I just leave green as it is. It's PWM or temperature wire I think. I wire on 24V DC, so each of fan receives full voltage- 12V.

So, both fans working, chinese run all the way at full speed. Arctic run 1 second on full speed, one second on low speed. What's wrong here? Something with green wire maybe?

3 wire fans are different, look at the manual as opposed to going by color of wire

CobKits said:

3 wire fans are different, look at the manual as opposed to going by color of wire

Click to expand...

This is writing on connector:
- black: 1
- yellow: TKG
- green: 2510

If that means something...

probably more related to connector than to the wires connected to them

Anyone? Fan is working as can you read. But not as I like.

Black is ground
Yellow or Red is 12V+
green is speed sensor

green is not needed, tape it off.

You cannot hook up 2 12v fans in series off of 24v unless both fans are identical. If one starts even a fraction of a second before the other for example, one of the fans will recieve the full 24v you will soon see smoke.

You need to use a 12v supply with the fans wired in parallel.

The 2 fans' grounds wired together, the 2 fans' red/yellow wired together, green taped off, and then those 2 wires connected to the 12v source positive and negative, this way each of the fans will receive the full 12v even if one fails in the future.

In series the first in the line gets the full grunt of the voltage, and then down the line less and less so this is not what we want with 12v computer fans.

@Johnei so I guess my mistake is I have two different fans. As I wired correctly.

But if you think about it, why would you use a 24V supply when all you need is a 12. If a fan ever fails or fluctuates the second fan in a series circuit will be damaged and could cause fire. with a 12v supply in paralel, if one fan fails or fluctuates, as most computer fans do because 1 may get dust and run slower than another both fans will still independantly get the full 12V, what i meantioned up there, to get a 24v series circuit running, not only do you need identical fans but resistor diodes to stop this from happening if both fans are not runing in identical fashion constantly forever, it's just more complicated than it needs to be with 24v.

Johnei said:

But if you think about it, why would you use a 24V supply when all you need is a 12. If a fan ever fails or fluctuates the second fan in a series circuit will be damaged and could cause fire. with a 12v supply in paralel, if one fan fails or fluctuates, as most computer fans do because 1 may get dust and run slower than another both fans will still independantly get the full 12V, what i meantioned up there, to get a 24v series circuit running, not only do you need identical fans but resistor diodes to stop this from happening if both fans are not runing in identical fashion constantly forever, it's just more complicated than it needs to be with 24v.

Click to expand...

So I wire both identical fans together and it's the same. Both are running a second on full speed and one second on minimum like they're dying.
So, could you tell me how I wire in parallel please?

I did up there, in detail, 2 posts back.

If you plan to try this out in parallel with that 24v source each of the fans will recieve full 24v and probably blow. You need to do this with 12V dc source.

Johnei said:

I did up there, in detail, 2 posts back.

If you plan to try this out in parallel with that 24v source each of the fans will recieve full 24v and probably blow. You need to do this with 12V dc source.

Click to expand...

Yes, I will connect to 12V DC. But I have wired that, if you see my first post.
Or if I update now with two identical fans which has yellow, black and green wires. Green I cut off. Yellow together, black together. Yellow to red from adapter and black to black from adapter. Correct? This is I have now, but it doesn't work.

The way you wired it in post #1 was with 24v source power, so both 12v spec'd fans got full 24v each, you probably damaged something, and now wiring to 12v isn't even working is my guess.

wire up just the one fan to 12v and see if it's working properly.

Johnei said:

The way you wired it in post #1 was with 24v source power, so both 12v spec'd fans got full 24v each, you probably damaged something, and now wiring to 12v isn't even working is my guess.

Click to expand...

New fans I guess.
Last question, what if I wire 3 fans like this together? They're 0,25A and adapter is 12V DC and 1A. So all yellows together, all blacks together and to one adapter.

1A 12V dc power source should handle three 0.25A computer fans no problem.

Thank you for your help @Johnei !!