This might sound odd and perhaps there is an easy solution to my question. I will be buying a used vehicle, and I want to ensure the AC is working properly. I am buying it from a small garage and they said the vehicle comes with a 30 day warranty. I turned on the AC and obviously it blows cold air because it is cold outside ( it is minus 2 degrees here ). I could not notice a difference between just cold air and when I had the AC unit running.
I also tried the same test on my current vehicle ( that has working AC ) and I again could not notice a difference. I tried to get the sales guy to give me a warranty on the AC till summer but he would not budge. Any ideas?