Glass door reach-in freezers typically used in supermarket applications are less prone to service problems than their open display counterparts. However, just like all refrigeration systems, they have their share of problems that a technician must be able to repair in a timely fashion.
A common problem with these cases is the evaporator coil icing up and causing the temperature within the case to rise. When the case is loaded with product, it is impossible to visually check the condition of the evaporator without removing some of the product from the bottom of the case. Doing this is a time-consuming task and often involves getting help from a store clerk.