DODGE NEON COOLING FAN NOT WORKING

My Radiator Fans Will Not Turn On When Getting To Operation Temperature. When I Turn The A/c On The Fans Will Come On Which Keeps The Car...

I Have 95,000 Miles, 4cyl, 2.0 L. The Car Was Overheating So I Added 50/50 Engine Coolant. I Used Half Of The Container. 5 Days Later...

The Rad. Fans Will Not Come On And The Car Overheats