Derek Cole explains that AC refrigerant systems are closed loops and should never lose refrigerant. If you're adding 1-2 pounds of Freon yearly, you have a leak that needs fixing, not a system that needs regular topping up.
Chapters
Refrigerant is low, it has trouble removing heat and putting it outside where you want it to be. Now, a common misconception is that I need a little bit of Freon, I need a couple pounds of Freon. That shouldn't be happening. You have a closed system. Your AC system is like your body. Your body is a closed system. You know, I shouldn't be bleeding out of my arm right here. If I'm bleeding out of my arm, I should fix the leak, right? I should fix the leak. You should fix the leak if you have a refrigerant leak. If you're constantly needing 1-2 pounds of refrigerant every single year, you have a leak. You need to get it fixed, okay?