This Avantco 17815645HC blanket heater element is a perfect replacement for the one that came with select GDC-40F-HC, GDC-49F-HC and GD-ICE-49 series units. It is a vital part of your unit's defrost system, working with the other components to help your unit remove ice buildup. A broken or malfunctioning element can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly.