CHEVROLET COOLING FAN

The Fans Work With The Air Cond. On, But Won't Operate Otherwise. Relay, Fuses Fine. Changed Temp. Sensor, Still Won't Come On....

Does The A/c Have To Be Charged For The Fan To Kick On When You Turn The A/c On?

My Fans To Keep My Engine From Overheating Are Not Turning On. I Have Changed Both Of The Relays And Also Checked The Fuse Box. The Relays...

My Cooling Fan Does Not Come On Until 225 Degrees And Does Not Run When Engine Is Turned Off. I Have Replaced The Thermostat, Inline Sensor...