Amana refrigerator defrost issue was resolved in the process of thoroughly inspecting & repairing all the defrost system part components this was successful. Such repairs were consisting of everything starting from taking out the bad parts with the Amana original parts, and moving on to the verification that the evaporator coils were not having ice buildup. As final step, we tested the unit out to verify that everything is working smoothing and the defrost system restored the level of cooling.