Because walk-in units can last so long, it is easy to take them for granted. But as with any other piece of foodservice equipment, operators will need to replace their walk-in units from time to time.
The panels are damaged from use or abuse. In the case of an older unit in which the panels are insulated with fiberglass, the insulation may start to settle and leave voids in the panels. When this happens, it becomes difficult for the walk-in to maintain the proper temperature.
The floors are starting to curl or come away from the panels.