A garage refrigerator kit is a system designed to trick your refrigerator into running the compressor more consistently when the garage gets cold. It consists of installing a small heater to prevent the thermostat from registering the outside temperature.
Garage refrigerator kits are meant to prevent the unit from staying off for long periods of time, which can cause the contents to thaw. They do not require much in the way of hardware or technical skill to install, using only a screwdriver and some basic knowledge of wiring. The installed kit adds to the power usage of your refrigerator, as the heating elements consumes a constant amount of wattage throughout the year.