Can anyone tell me what My Kenmore upright freezer 20cu ft should be at? temperature I mean?

Freezer temps can very, but as we know freezer temps can run from +32F to -40 or more on commercial boxes with the different freons. But back to you, I would say from my charts on low, med., temp refrigerators, you should be around +8F to -5F. When I mentioned +32, we know that's when water starts to freeze, so you want the freezer to be much colder then that.In order to keep ice-cream frozen, you must cycle around -5f to -10f.I sincerely hopes this has helped you out, as you will I am sure get many different opinions, but +8 to-5 is excellent for this box.
Sincerely,
Shastalaker7