hissing ac and defroster
I also have a 2002 Sedona that has the same hissing sound. I bought it used 56K miles and noticed it a few days after I purchased it. I recently took it in to have this checked and because it was driving me crazy. It only happened when the AC or defroster was on. The mechanic told me that it was the AC compressor and that it would cost me a lot to replace it. The sound is tolerable, but annoying. I read in a past forum from 2005 about the same problem with the Sorrento that was fixed with an adjustment in the "pressure" in the AC unit itself. Does anyone have more information about this?