This Avantco 18937187 refrigerator control is a direct replacement for the one that came standard on BMAC, BMCAC, BVAC, WMAC, WMCAC, and WVAC series air curtains. Maintaining the correct temperature inside your refrigeration equipment is one of the most important parts of food safety, so if you suspect that your unit's controller is not operating correctly, replace it promptly to avoid any potential spoilage and lost profits.