Manual Defrost Freezers found in: 20 cu. We prefer the manual defrost as when we clean out the freezer, no product is left - just unplug and let melt and drain. Where can I find a list of ENERGY STAR certified French door refrigerators? We prefer the manual defrost as when we clea.4 Cubic foot freezer! What is manual defrost. If I have a refrigerator that I need to manually defrost, how do I do it, and how often is it needed? See more What is the difference between automatic and manual defrost? Chest Freezer with Manual Defrost and Key Lock - White, 14. Because of the on/ off cycling defrosting routine, temperatures tend to fluctuate often, and the self- defrosting freezer must work harder to restore the ideal interior temperature. Self- defrosting ( chest) freezers are more popular than the manual defrost type because they reduce freezer maintenance considerably, but they do have a few downsides. Low Cost - Manual defrost a less popular option, so appliances that feature manual defrost are less expensive.