This Switch, Toggle-Rinse/Program is a genuine Bunn OEM replacement part. Part number 28857.0000 is used for certain commercial coffee equipment made by BUNN. This part will help repair specific issues you are having with Bunnomatic model FMD2, FMD3, FMD5, IMIX3S, IMIX5, IMIX5S, PAF Fresh Mix Dispensers. Replace this part if BUNN or a service technician has instructed you to do so. Over time Switches for Bunn FMD2, FMD3, FMD5, IMIX3S, IMIX5, IMIX5S, PAF Fresh Mix Dispensers may need to be replaced because of normal wear and tear or if damage has occurred to the existing part. When replacing BUNN part #28857.0000 it is suggested that no power or water is connected to the machine and you are working in clean and non hazardous environment. Please be sure Switch, Toggle-Rinse/Program fits your specific needs.