U.S. · Home appliances
LG air conditioner serial number date decoder.
Enter the serial number from the tag to see the manufacture month and the years the first digit can mean.
Your serial number
Result
LG’s help page for air conditioner tags says the serial number starts with three digits. The first indicates the year of manufacture and the next two the month. This page reads exactly that, and because LG does not say which decade the year digit belongs to, it lists the matching years instead of guessing one.
How this is worked out
LG Canada’s help page “Locating model/serial number tag on air conditioners” states that LG model numbers always start with a letter while the serial number starts with three numbers, the first one indicating the year of manufacturing, followed by two digits identifying the month. The page does not say which decade the year digit refers to. This decoder therefore treats the digit as the last digit of the year and lists the 2000s, 2010s and 2020s years that end in it, up to 2026. That mapping is our reading of LG’s wording, not an LG chart. The page covers air conditioners; we did not find LG making the same statement for refrigerators, washers or other appliances, so use this for other LG products only as a hint. Source read 2026-11-01.
Worked example
506XXXXX123: the first digit is 5, so the year ends in 5 (2005, 2015 or 2025); the next two digits are 06, so June. A window unit still in service is most likely June 2015 or June 2025 depending on the model’s release year. 312: year digit 3 and month 12, so December 2013 or December 2023. 413 is not valid because 13 is not a month. These are illustrations, not real units.
Mistakes people make
- Reading the model number. LG says model numbers start with a letter and serial numbers start with three digits.
- Taking the year digit as a full year. One digit cannot tell 2015 from 2025; use the model’s release year or purchase date.
- Applying it to every LG product. The source covers air conditioners only.
- Using a refurbished unit’s label. LG notes labels on refurbished, as-is or final-sale units may have been removed.
Who this is for, and what it does not cover
It suits anyone checking the age of an LG air conditioner for warranty, resale or replacement. It does not confirm the serial number is real, show warranty status, or decode LG televisions, refrigerators or laundry. For those, contact LG with the model and serial number.
FAQ
How do I read an LG air conditioner serial number?
LG says it starts with three numbers. The first indicates the year of manufacturing and the next two digits identify the month.
Which decade does the first digit mean?
LG’s page does not say. This page lists every year ending in that digit up to 2026 so you can pick using the purchase date or model year.
Does a month of 13 mean the serial number is wrong?
The month digits should be 01 to 12. Anything else means a typing slip, or a serial that does not follow this scheme.
Does this work for LG refrigerators and washers?
LG’s statement we read is on its air conditioner page. We did not verify the same scheme for other products, so treat other results as a hint only.
How is the serial number different from the model number?
LG says model numbers always start with a letter and serial numbers start with three numbers.
Does this page send my serial number anywhere?
No. The decoding runs in your browser.
Sources
Retrieved 2026-11-01. Each source was opened and read against the claim next to it.
- LG Canada: Locating model/serial number tag on air conditioners: the serial number starting with three numbers, year first and month next, and the refurbished-label note.
- LG USA: How to Check the Model and Serial Numbers on LG Products: where the model and serial label is on LG products.
General information only
This page is general information, not legal, compliance or financial advice. Manufacturers change their serial formats, and your unit may differ. Confirm anything that matters, such as warranty status, with the manufacturer. Everything runs in your browser; nothing you enter is sent anywhere.