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How old is my American Standard packaged unit?

Serial number age decoder for American Standard packaged rooftop and ground units: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.

Serial number decoder for American Standard packaged unit

Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.

Format example: 130313596L

Format eras

How to read the serial

2010 to present formatVERIFIED

Shape #########A · example 130313596L · confidence high

Year
digits 1-2 (YY, 2010+)
Week or month
week = digits 3-4
Plant
remaining chars include plant/line and day-of-week; not published

Example: serial 130313596L decodes to week 3 of 2013.

Trap: 2002-2009 style used a SINGLE leading year digit (Y WW ...) e.g. 91531S41F = 2009 wk15; a 10-char 2010+ serial starting with 1 can be misread as 2001-2009 style. MFR date usually printed on plate anyway.

Listed under Trane in the source; American Standard is named in that format's family and the corporate link is an estimate, not a checked fact.

Where the data plate is on a packaged unit

On the cabinet exterior near the electrical access panel, or inside the panel door.

General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.

Official lookup: the authority

Open the official American Standard lookup takes serial number (+ last name for full certificate); returns warranty certificate; product-only info without last name; URL verified live

Open the official American Standard 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

Sources