Was driving to work when I started to small a burning smell coming through the vent. The smell didn't last long. That night I left work and the ac was only blowing hot air. I checked fuses and they were fine. Bought an ac bottle and hooked it to the car and it goes straight to the red while the cars running and ac on. The compressor never comes on. Is there a way to get the compressor to come on long enough for me to recharge the freon? Or is there another common issue I'm missing?