York serial number with year code L: 1981 or 2002
In the York 1971 to 2004 format the year letter L means 1981 or 2002. Two or more years share this letter, so the plate's other dates or the official lookup settle it.
Serial number decoder for York
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: WAKM011379
- A York serial number with year code L was built in 1981 or 2002 (1971 to 2004 format; source: building-center.org).
- Letters A-N repeat (1971-1984 vs 1992-2004): 21-year cycle. Some serials carry a parenthesized leading letter e.g. (S)EBHM062202 - ignore it. Style ran to Oct 2004, so 2004 has BOTH styles.
The full year-letter table
| Year code | Year(s) |
|---|---|
| A | 1971, 1992 |
| B | 1972, 1993 |
| C | 1973, 1994 |
| D | 1974, 1995 |
| E | 1975, 1996 |
| F | 1976, 1997 |
| G | 1977, 1998 |
| H | 1978, 1999 |
| J | 1979, 2000 |
| K | 1980, 2001 |
| L | 1981, 2002 |
| M | 1982, 2003 |
| N | 1983, 2004 |
| P | 1984 |
| R | 1985 |
| S | 1986 |
| T | 1987 |
| V | 1988 |
| W | 1989 |
| X | 1990 |
| Y | 1991 |
Month letters
| Month code | Month |
|---|---|
| A | January |
| B | February |
| C | March |
| D | April |
| E | May |
| F | June |
| G | July |
| H | August |
| I | September |
| J | October |
| K | November |
| L | December |
Official lookup: the authority
Open the official York lookup takes serial; returns warranty details ('HVAC WARRANTY LOOKUP'); URL partial
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
Sources
- https://www.building-center.org/york/
- img: YORK-Serial-Number-Style-2.jpg (transcribed)
- https://york.bosch-hcgroup.com/residential-equipment/warranty-and-registrationofficial