I have a 2002 Sonata with 75,00 miles on it. Yesterday I used the a/c with no problem. I then used the heater later that night. Now I can only get it to blow hot air. No matter what setting I use, hot air comes out of the vents. The compressor seems to be running and the lines coming from it are very cold. I think maybe the heater switch is stuck or something. Can anyone help? Thanks.
Duane