To determine the age of your appliance, use your serial number (not model number) to find date of manufacture. Our serial numbers begin with two letters followed by six numbers. The 2 letters at the beginning of the serial number tell you the month and year it was made. Where is my model and serial number located?Click to see full answer. Herein, how can you tell how old an appliance is? You can determine the age of your appliance by looking at the serial number on the nameplate. The first number indicates the year of manufacture, and the second and third digits indicate the production week. For example, 13500016: week 35 in 2001. You will find this information on the manufacturer’s data plate: Secondly, how old is my Maytag appliance by model number? Find the year and month code. Each Maytag serial number contains two letters. These represent the year and month of manufacturing. They should be the ninth and 10th characters of the serial number. Keeping this in consideration, how old is my LG appliance by model number? LG appliance serial number age finder: To determine a LG appliance age you need the serial number. The first digit is the year, the second and third is the month. In the above example the Manufacture date would be March of 2005.How do you find out what year my stove is?Date codes – First letter is the month and the second letter is the year. The date code is in the letters on your serial number. The first two letters on the serial tag give you Month, Year. The first 2 letters show the manufacturing date.