The final essential component for your refrigeration system.

Begin by deciding on either a mechanical thermostat or a digital thermostat.

Also shown here are thermostats for spillover systems - where the compressor/condenser/evaporator plate are in the freezer section which is separated by a common wall from the refrigerator section. A thermostat-controlled fan is installed in the common wall, on the refrigerator side to regulate the cold air entering from the freezer side.