Okay so this is what's going on with my fans so when I turn my car on with the AC running both fans are turning but if I turn AC off only one fan remains on however my car immediately starts to get hot and unless I turn the AC back on my car will overheat but like I said when the car is running with the AC on both fans are running though

Get the codes out of the car - flush the cooling system and change the thermostat and then see what happens