Jim is correct. The more product a box has in it, the longer between cycles the unit will run. Second, remember that these boxes are 40 years old and the insulating factor has probably dropped over the years. 32 degrees seems a bit low and thats good! Means that the unit is still running well. In the vending sector, we look for between 38 and 42 degrees. The lower the temperature you are looking for, the harder the unit has to work. Finally, Nate hit it on the head. Keeping the
"dust bunnies" out of the coils is a must! This will drive the head pressure up shortening the life of the compressor! I know, I changed over 475 last year for my customers. Great for me, not much fun for them.