The compressor comes on but no air blows out the vents @ a stand still. Now, when I'm driving on the hwy or @ a good amount of speed. I get some air blowing out the vent...... I checked the fuses & tried changing out the resistor. I looked to change the fan motor but, I'm not sure that i want to do that without being 100% that it's the fan motor... My other thought would be maybe my freon is low?