I just added more freon to my car because it wasn't cold at all. Lately, i've been realizing that i only feel AC being cold when my car is in motion. When my car is in traffic or a stop, AC is blowing warm/humid air. Is it the fan in front of the car not working(sucking air to the AC compressor unit)? Can anyone help me out??? The darn summer heat is starting to bug the crap out of me!!!! THX Guys!!!