You have to be careful if you have a frost-free freezer. I don't think they are good for long term storage of foods. It goes through a warming cycle every few hours to keep the frost from forming so the food don't stay at a constant temperature the entire time. I try to use my food-cooked myself- within the month. Of course, mine is several years old and may be ready to be replaced. I'd like to get a separate chest freezer for longer term storage.
http://home.howstuffworks.com/question144.htm Quote:
Every six hours or so, the timer turns on the heating coil. The heating coil is wrapped among the freezer coils. The heater melts the ice off the coils. When all of the ice is gone, the temperature sensor senses the temperature rising above 32 degrees F (0 degrees C) and turns off the heater.
Heating the coils every six hours takes energy, and it also cycles the food in the freezer through temperature changes. Most large chest freezers therefore require manual defrosting instead -- the food lasts longer and the freezer uses less power.
Sarah