How old is my LG heat pump?

Serial number age decoder for LG heat pumps: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.

• LG heat pump serial numbers in the 2000 to present format encode the year as position 1 = last digit of year (2 = 2012 or 2022); decade NOT distinguished - use the plate's printed manufacture date or model era. A 13-char variant carries two year digits (1201KAPB00104 = Jan 2012) and the month as positions 2-3 (01-12) (source: building-center.org).
• Example: serial 207KRMK0Y171 decodes to 2002 or 2012 or 2022 (July).
• The 2000 to present format is ambiguous: Decade ambiguity (407HAVN79423 = Jul 2024 or Jul 2014; plate said 2024). Regex tolerates the 2-digit-year variant; a decoder must reject month > 12.
• LG's official lookup at lghvac.com returns warranty / registration lookup.

Format eras

• 2000 to present VERIFIED
  ###AAAA#A###position 1 = last digit of year (2 = 2012 or 2022); decade NOT distinguished - use the pla

How to read the serial

2000 to present formatVERIFIED

Shape ###AAAA#A### · example 207KRMK0Y171 · confidence high

Year

position 1 = last digit of year (2 = 2012 or 2022); decade NOT distinguished - use the plate's printed manufacture date or model era. A 13-char variant carries two year digits (1201KAPB00104 = Jan 2012).

Week or month

month = positions 2-3 (01-12)

Example: serial 207KRMK0Y171 decodes to 2002 or 2012 or 2022 (July).

Where the data plate is on a heat pump

On the outdoor unit, same place as a condenser: a plate on the side or back of the cabinet near the line set. The indoor air handler carries its own plate with its own serial.

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 Heat Pump at 10 to 15 years of expected service (nachi.org). That chart is a guideline, not a prediction for your unit.

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/
• https://www.building-center.org/lg-appliances/
• img: LG-1-Serial-Number.jpg, lg-tag-2.jpg (plate: 207KRMK0Y171 / MANUFACTURED 2012.07)
• https://lghvac.com/warranty-page/official

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