We have a 2007 grand caravan. The ac has a leak. Works fine when I charge it. I just added uv dye. Could not see it leaking anywhere. I was putting air in my tire at a service station when I saw the water dripping fron the exhausts tailpipe has a neon green tint to it. This blew my mind. I was under the impression the ac was a closed system. Any thoughts?

 

Do you have rear A/C?