This Avantco 17811745 fan motor is a perfect replacement for the one that came with A-12F and select Z2 series units. It 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.