case fans Fans not spinning but light up

[monkeyfacepower]

I just built my first gaming PC, I have a problem where even if I'm playing a game my case fans won't spin. What i find strange is that the fans light up. 2 of them actually work (one on the back and the cpu cooler's one.

I have the Antec nine hundred case and a b360 aorus gaming 3 motherboard. I tried to look into the BIOS but am not that used to this (just switched from mac laptop to a windows 10 tower)

If you need any more information or me to look up at something just ask, am worried about temperatures going to high or something.

[TitanXp]

probably the voltage is below the start voltage of the fans.

maybe the fan regulation is configuerd wrong. so first try all fans in the port for the back fan.

[monkeyfacepower]

Thanks for your reply i tried what you said and it didn't work (the back fan worked in the other places for the fans. I noticed that the fans had something kind of like a switch with L M H the fans not working were on L (low probably) so i guess the low setting didn't give them enough voltage like you said. I put them all on Medium and now it works fan. Sorry for taking your time. I don't know how i didn't notice those before they're kind of obvious.