You guys crack me up! As i12drivemymp5 indicated, the A/C is used to defog the windows by removing humidity. I really need that function for the winter. In that situation, the A/C button will be un-lit, but still use the A/C to remove humidity. Because it uses the A/C during all selector positions EXCEPT the straight-in-your-face position even when the A/C light is NOT lit, people have chosen to disable that feature to save on fuel. As for my A/C problem...I just read in our manual today the the A/C may not run if the temperature is near the freezing mark (which it is). So hopefully there's my explanation... THANKS!!