The original post says "I've got the right side wont cool thing"..... Do the other vents throw cold air? If they do it is not a refrigerant issue, it's a issue with the stepper motor or the temp control. Do the other vents have cold air coming out ? If so it has nothing to do with the amount of freon in the system. The term "freon" is like the term "kleenex". A popular brand name synonymous with refrigerant. I am a A/C service tech for 35 yrs.