May 18, 2025 - If you are unable to read the label you can look down into the condensing unit from the top to see the compressor and often use the compressor part number to determine the tonnage using Google. The age is generally encoded into the serial number. ...

The Building Intelligence Center provides the largest resource library with the most comprehensive lists of mechanical appliance brand names with most examples of their various serial number styles and date codes. Upkeep and professional servicing of the heating and cooling systems and other mechanical systems is a critical part of routine building maintenance. For improved safety and longevity of these systems, the Building Intelligence Center recommends inspections and professional servicing be performed by a qualified inspector and/or service technician/contractor seasonally or annually. To determine the age of an HVAC system or water heater, begin your research by locating the brand name and serial number on the HVAC system or water heater.

You can also use this form to LEARN THE AGE of your unit to determine if it is still in warranty, please click here to download the Serial Number Code/Age of Unit form pdf.

October 19, 2025 - On most units, the age of your air conditioner is deciphered by looking at the first 4 numbers of the serial number. However, it may take a little more time to distinguish what these numbers mean.

March 21, 2021 - Serial number formats vary by range of years over which equipment was manufactured, and may vary among countries of manufacture for a given company’s equipment, for example between the U.S. and Canada for Carrier air conditioning equipment.

The date of production/manufacture or age of Carrier® brand HVAC equipment can be determined from the ten character serial number located on the rating data plate.

October 25, 2018 - For example—and this is only ... fiscal week of 2007, i.e. January 2007. How did you determine this? The 7 represents the year, and 03 is the fiscal week....

In order to calculate the age of your air conditioner, all we need is your heater’s serial number.

The serial number is a ten digit code that helps us identify the time the unit was produced, as well as the model number and many of the sub-components used on a specific unit.

September 26, 2024 - For example, if your unit’s serial number is 7754F411026, then the three digits following “F” might point to the manufacturing month and year, which, in this case, would be April 2011. An AC unit’s installation date likely falls shortly after its manufacturing date.

May 27, 2025 - You should find the serial number there, which often starts with four digits representing the week and year of manufacture. For example, a Carrier AC serial number might be 4605E78962, indicating the unit was manufactured in the 46th week of ...

October 20, 2025 - Here are some tips to determine the correct age of your air conditioning unit. The AC condenser is responsible for releasing the heat that has been pulled from inside your home. The nameplate on the condenser will have the manufacturer’s name and the serial number.

August 14, 2019 - Here is how you can know this. The 12 in this serial number represents the year, the 31 is the fiscal week, and just for fun the 2 is the work day of the week this unit was “born”.

November 3, 2020 - Use the second letter in the serial number to find the month. York AC Unit Month Age Chart For Units Manufactured Before 2004.

March 14, 2025 - While the exact format might differ depending on the model and the year it was built, here is a general guide on how to interpret it: First Two Digits: The first two digits usually represent the year of manufacture.

October 19, 2025 - Check the upper-right hand corner of the nameplate for the unit’s manufacture date. If the manufacture date is not visible on the condenser, you can always locate the brand, model and serial number on the plate, which will help to determine ...

March 2, 2022 - YY7777777 (1st and 2nd numbers indicate the year of manufacture) Heat pumps and ACs typically have a 15-20 year service life expectancy depending on model, manufacturer, installation, and luck.

January 2, 2006 - (Of course, now that they’ve been bought by Goodman, who knows what’ll happen.) **BARD **1962 to March 1980 Sample Number 123456 A D 1st six digits are the Unit Identity Number.

The first pair of numbers is the year, and the second pair of numbers is the week. For Example, Model No.: NAC042AKA5, SN: E031136011 was Manufactured in 2003, Week 11. Since 1974, the first and second digits are the manufacturing plant; the 3rd and 4th are the decade and year, and the 5th ...