Bill:
We have the AB super cold machine, air cooled on our IP35-165, 1994 and this system had a leak and was fixed by the original owner over 10 years ago. Since 2002, we turn our on in April and off in October and it keeps the freezer plate/box section at 20 degrees. If I were you, I would find the and fix the leak and then the system will work for a long time. I do not have any experience with Freeze 12.
Hayden