For a vehicles AC system to function optimally it needs a full charge of clean, dry freon. We will do a visual check for leaks, a functionality test of the system, then connect our fully automatic AC recover, recycle machine that will reclaim any freon, vacuum the system for a prescribed time, do a leak down test to check for leaking system, then it will inject the amount of oil taken out in vacuum process, then inject dye into the system for detecting future leaks, Now it's time to recharge with the correct amount of new freon. The service usually takes about an hour.