Only one radiator fan running at high temp on 1999 Dodge Stratus

Hi, when i am running my air condition only 1 FAN runs at high RPM. I checked & replaced the relays. Both fans runs when the car is not hot & air condition is not running.
Is this normal? BTW, my car heats up if idle for too long?
Any suggestions..

Asked by for the 1999 Dodge Stratus
Hi, were you able to figure out what was causing the fans to operate like this?