The level of Freon/refrigerant in the system always stays the same- unless there's a leak. For clarity, it isn't used up like gas in a car. It just gets pushed around your AC system. While moving through the system, it collects heat inside your house at the evaporator and dumps it ...
Refrigerant lines are a closed system; no freon goes in or out if AC is operating normally. Leaks in refrigerant lines are not all that uncommon. Unfortunately, in many cases, you will need to contact an HVAC professional to fix the leak and refill the refrigerant. If you have a bit of...