How old is my LG air conditioner?
Serial number age decoder for LG central air conditioners: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: EQ11220013150001
- LG air conditioner serial numbers in the before 2012 format encode the year as positions 6-9 = 4-digit year and the month as position 10 (1-9, A=Oct, B=Nov, C=Dec); day as positions 11-12 (source: building-center.org).
- Example: serial EQ11220013150001 decodes to March 2001.
- LG's official lookup at lghvac.com returns warranty / registration lookup.
Format eras
- before 2012 VERIFIED
AA##############positions 6-9 = 4-digit year
How to read the serial
before 2012 formatVERIFIED
Shape AA############## · example EQ11220013150001 · confidence medium
- Year
- positions 6-9 = 4-digit year
- Week or month
- month = position 10 (1-9, A=Oct, B=Nov, C=Dec); day = positions 11-12
- Plant
- positions 1-2 = buyer code, 3-4 = model code, 5 = line number
| Month code | Month |
|---|---|
| 1 | January |
| 2 | February |
| 3 | March |
| 4 | April |
| 5 | May |
| 6 | June |
| 7 | July |
| 8 | August |
| 9 | September |
| A | October |
| B | November |
| C | December |
Example: serial EQ11220013150001 decodes to March 2001.
Where the data plate is on an air conditioner
On the outdoor condenser: a metal or foil plate on the side or back of the cabinet, often near the refrigerant line connections. Some brands repeat it inside the electrical access panel.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
For scale only: the InterNACHI Standard Estimated Life Expectancy Chart for Homes lists Air Conditioner (central) at 7 to 15 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.
Open the official LG lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- HVAC and appliances share one style: position 1 = last digit of year, positions 2-3 = month (207KRMK0Y171 on an LG refrigerator plate stamped MANUFACTURED 2012.07; 407HAVN79423 on a 2024 mini-split). Decade must be inferred; newer plates print the manufacture date. Building-center's LG APPLIANCE page mislabels positions 2-3 as 'week' but its own plate photo (2012.07) proves month. lghvac.com/warranty-page/ = 200 (warranty terms, not a serial lookup); lg.com/us/support = 200. LG's own help-library article on manufacture dates could not be located this session (search budget exhausted).
Sources
- https://www.building-center.org/lg-hvac-age/
- img: LG-2-Serial-Number.jpg
- https://lghvac.com/warranty-page/official