How do you add freon to an 99 navigator?
If your A/C stops blowing cold air several days, weeks or months after you recharged it, it means the system has a leak and the refrigerant is escaping. You should add some leak detection dye to the system to find the leak. The leak should then be repaired before the system is recharged again; otherwise you are just wasting your time recharging the system over and over again.
