Hi all, new to the forum but here goes! I have an 04 Ford Explorer. Late last year the A/C was not getting very cold and now is not getting cold at all. I assumed that it simply needed recharged. However a new problem presented itself before I got the A/C recharged. A few days ago, anytime the A/C / Heater fan is turned on, you can hear a "hissing" sound coming from the rear compartment, driver side. The sound comes and goes and gets loud and quiet with no pattern. If you open the hatch, the sound is coming from the "vent" on the driver side of the rear compartment. Im not sure if the hissing sound and the A/C problem are related or not! Any info would be appreciated.