I will add that I have an upright refrigerator/freezer in the main garage that to-date has had no problem with either the freezer nor refrigerstor sections. However, this is at least 15 years old.
I think the problem is on the newer ones, at least mine, is that it is a combo with no actual thermostat for the freezer side. It just takes the air and directs gives more to either side based on the where the dial is turned on the freezer side. That dial on the freezer side just changes flaps that directs air to either side.
The sensor bulb is located outside, underneath the fridge/freezer. I'm not any kind of fridge/freezer guy, but I'm assuming that bulb gets it's temperature reading that comes from the small tube coming from the thermostat. Because the bulb is outside the unit, and if in a cold climate, it's already way colder than any setting on that fridge, and it isn't gonna run, period.
