The freezer of my (GE) fridge doesn't have a separate thermostat -- just a vent into the refrigerator compartment. If I get the freezer down to zero, the refrigerator is below 32. If I get the refrigerator compartment to 37, the freezer is at 5, which is not cold enough for my taste.
I don't have room for a chest freezer, and a Sub-Zero is well out of my price range. Any suggestions for a fridge with a big freezer at the top that gets down well below zero?