My wife and I bought a Kenmore chest freezer (14.8 cubic foot) about 6 weeks ago. It is made by Frigidaire for Sears, and the model number is #253.165.42105, serial # WB94341279. It has been working OK. However, I put two high-quality thermometers in the freezer, one deep in the center of the freezer and the other in one of the baskets near the top of the freezer. The temperature setting was on #5 out of a possible 8, where 8 is the coldest. The temperature in the center ranged from -13.2F to +8.1F, a difference of nearly 23F degrees. The basket thermometer ranged from -7F to 18F, a difference of 25F degrees. That seems to be far too great a swing in temperatures ? and it was measured without the door being opened except to read the thermometers. I?m sure this model freezer has a factory specification for the maximum temperature differential allowable before the unit turns back on to lower the temperature. Could you please let me know what it is? Everywhere I read it says that frozen food should be kept below +5F degrees for maximum safety and quality. Even the center of the freezer doesn?t stay below +5F degrees. Please let me know the spec for the maximum temperature differential for this freezer and what I should do about its performance. Thank you.