This Avantco17816748 evaporator motor is a direct replacement for the one that came with select Avantco UDD, UBB, SS-WD, and SS-UD series units. The evaporator motor is a vital part of your unit's refrigeration system, working with the other components to help your unit dissipate heat and keep the cabinet set to the right temperature. A broken or malfunctioning motor can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly.