I have a 99 civic. The air conditioning usually works beautifully. I usually drive about 11 miles to and from work, but don't use my car much beyond that. A few weeks ago, on a hot and humid day, I was driving on a highway for about 40 miles. The AC kept alternating between nice cool air and hot and humid air. It wasn't very pleasant. Since then, I've had no problems at all. What could have caused this?
Thanks!