I have an '02 Taurus with 85k miles on her that I just bought. Today when I was checking something under the hood I noticed this metal line cold and dripping with water...



I had the air on but turned to the position of arrows pointing out of the dash and floor vents only. The defrost or a/c function was not selected. It seems to be doing it consistently. I haven't traced all the parts of this car's a/c system yet but I don't know of anything else under a hood that turns cold and sweats. Why would my compressor be working when it's not selected? What tests should I run?

 

Where was the temp **** setting when this happens?

 

Good question I haven't been paying attention. But since I only use the fan function to warm the car I'd guess it was toward the warmer side. I'll start paying attention to that and see if it makes a difference.