Upon arrival to homes and businesses, when technicians engage in the initial consultation as to what’s been going on with the system, we regularly hear comments like, "Can you be sure and top it off with freon" … or "I called because I wanted to have you give it a shot of freon it’s not running as cool as it should".  The common misconception seems to be that Freon in an HVAC system dissipates much like the oil in a car does.  I must say, that 18 years ago before entering the HVAC industry I too believed that every so often an air conditioner needed the freon to be filled as if when it was all used up the unit would no longer blow cold air. And I know it doesn’t help the misconception when we receive fliers or cold calls from companies telling you it’s time you had your Freon changed or replaced, or better yet those signs... more»