The cooling coils, also known as condensers, are located away from the heat to allow the fluid that’s been heated to cool. This is an integral part of the system. The more amount of heat that is transferred from the cooling coils to the surroundings, the colder the expansion valve will be able to make the cold compartments in the refrigerator.  The properties of the coolant cause it to become liquid at cooler temperatures. In the cooling coils, the surface area of the tubing is maximized to allow the heat to transfer from the tubes to the atmosphere. Once the coolant bends through the various twists and turns of the cooling coils, it is then sent through the expansion valve and onto the compartments to cool them down.