Previously, it was a complex series of letters and single digits. The year 2000 started the numerical numbering from 00.ġ4th & 15th digits = Factory Code (01=OH 02=GA)Ĭarrier, Bryant, Payne, Day & Night**: **Recently (last 20 years or so) the first four numbers in the serial number represent the week and year. This serial number style was only used during the months of April & May 1980.Ħth thru 11th digits represent the Unit Identity Number. In this sample D represents April.ĥth digit is the year of Manufacture. (The letter D in the Sample represents 1964).ġst three digits are the Compressor Part Number.Ĥth digit is the month of Manufacture. (The letter A in the Sample represents January).Ĩth digit is the year of Manufacture. In this example they are represented by the numbers 123456.ħth digit is the month of Manufacture. (Of course, now that they’ve been bought by Goodman, who knows what’ll happen.)ġst six digits are the Unit Identity Number. I’m bringing this over here for future reference…Īmana: BLACKHORSE.
