I have been testing turning off the fridge at night for 8 hours. The theory is that being off for 8 hours will reduce its electricity usage. This thought process would be incorrect. Since the fridge cycles on and off whenever it wants, all this does is force it to cycle longer when the timer turns it on. Instead of 30 minute cycles you get a long 2 hour and 45 minute cycle. It save you nothing, at least that you can tell with a kill-a-watt meter. I still use the same 2 kWhrs as I did before I started the test.

Why did the fridge turn on at 3am? Why not 6am? Well it normally does turn on at 6am, but I woke up and wanted something to drink @3am. I usually drink milk that early, helps me go back to sleep. Well, the milk was cool but not very cold. That was the end of the experiment. The last thing I want is for food to go bad.

The only way I can see this saving electricity is that the food inside warms up. Think about how a programmable thermostat works. (Heating) You set it to let the temperature go down to say 60 degrees at night becuase you are under the covers of your cozy bed. During the 8 hours while it is lower then the normal setting you are losing less heat to the outside becuase of the delta T being lower. The reverse is happening inside the fridge, the temperature is going up. Sure you may save a little electricity, 25 cu ft. fridge vs. 25,000 cu ft.  house. But not enough to notice. The house will lose more % wise in 8 hours then a fridge. The fridge is sealed much better. Soooo, don’t try this at home.