Seven Digit Serial Number (for units manufactured before 1970) Week: 01 = First week of January, 52 = Last week of December We’ll show you how to decode each carrier serial number styles in the following examples. It will be a little hard to figure out exactly the carrier ac age from old carrier serial number. Older Carrier units used many different styles in their serial numbers and have changed over the years. The first 2 are the week of the year and the second are the year. New Carrier units (air conditioners, heat pumps, furnaces) use a 4 digit number of first four serial number to determine the age. How to Read Carrier Serial Numberīelow are the most common styles or format of carrier serial number and how to decode it. look into the interior of the metal door – you might see a label or tag with the carrier serial number and the model number also. Remove the metal door of the outdoor unit. You can find the carrier serial number on a rating plate sticker attached to the inside of the unit on the left side near the top. Knowing your system age is important because it can give you substantially about whether you might be able to repair or replace the system with a new one.
It contain information in what year the unit was manufactured, as the easy way to identify the carrier ac age is due to the serial number. However, there may be exceptions (3 letters with 3 numbers or 6 numbers for certified chronometers).There are reasons why you should know your Carrier Serial Number. It is generally comprised of two or three letters followed by four numbers. There are two numbers engraved on the caseback of your watch.
Looking at the table of Waltham serial numbers (see example below), you can see that number 20,900,000 was made in 1917 and 21,800,000 was made in 1918 (marked in red in the table below). Note that we're using the serial number from the watch movement, not from the watch case. The four-digit number engraved on the back of the case is the model number. The longer, eight-digit number with letters is the serial number of the watch. On the back of the watch case are two series of numbers. To identify the model of a Cartier watch, turn it over and place it on a clean, soft surface. Identify the material of the case, bezel and the bracelet. Serial numbers on many Cartiers can be found on the case back. Serial number determines Serial number determines Model. You can find both items on your original Cartier paperwork, warranty card, or watch appraisal.
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