Why do Refrigerator evaporator coils leak?

Answer 1

The Refrigerator evaporator coil has many forces working upon it from a wide swing of temperature and pressure and vibrations that is caused. Then there is the ice that builds up on the coil between defrost cycles that produces some of the forces that are on the coil. To that add electrolyses of the different metal that are uses in the coil and the corrosive chemical bath that comes from the area and products being refrigerated. The refrigerator evaporator coil have a lot of silver soldered 90 degree union fitting that the forces work on. Than there is the design of the standard refrigerator evaporator coil. The coil sets in the drain pan and drips condensate into the drain pan. A long with the condensate comes some of the dirt and lent that collects on the evaporator fins and if not maintained it will plug the fins and than plug the drain pan. And fill the coil with condensate then more ice. When you really look at the refrigeration evaporation coil you wonder why they don't leak more. I am not even going to talk about the guys that defrost refrigeration evaporator coils with a ice picks.

Answer 2

Refrigerator evaporator coils can leak due to corrosion, physical damage, or manufacturing defects. Corrosion can occur over time as a result of exposure to moisture or contaminants in the air. Physical damage, such as accidental impact or bending, can also cause leaks. In some cases, manufacturing defects may result in weak spots or imperfections that lead to leaks.