Engine fan comes on when engine temperature rises. The fan does not come on when I turn on the AC. All other cars I've worked on the fan comes on when you turn on the AC. I had the AC evacuated and charged with no leaks. The compressor kicks in. The AC lite comes on in the dash and it only blows warm air. Any ideas where to go from here.

 

Maybe the air compressor of your car is broken. Check it

 

if you have no leaks and fully a fully charged system but only get warm air either the AC compressor is shot or the incab AC filter completely blocked, when its operating are the gas lines on the compressor hot or cold or both?
Russ