Radiator fans.

[tmorales509]

I was wondering what i would need to test my rad fan relays to see if they are working and how. My fans stay on all the time, as soon as i start the car they come on until the car is turned off. I went to autozone yesterday and they told me temp switch, so i bought it, but they still stay on. I was replaced 1 of the 3 relays but still nothing and i wanna check the remaining 2 to see if they are the problem before i spend like $50 on 2 relays i dont need. And also besides the temp switch and relays is there anything else that would cause this?

[robo_geek]

if there is trapped air in the system, coolant will not flow properly, and the fans will stay on all the time

[tmorales509]

Hmm i replaced all relays, and even got some fans from the junkyard thinking maybe my fans could be shorted or something but nothing. How would i tell if there is air or how can i fix that. Also Where would i look for like a short in the wiring that would keep the fans on?