How old is my GE Zoneline PTAC?
Serial number age decoder for GE Zoneline PTAC and through-the-wall units: 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: ZTN730A100AC
- GE Zoneline PTAC serial numbers in the 1944 to present format encode the year as letter 2, 12-year cycle (table below) and the month as letter 1 (table below) (source: building-center.org).
- Example: serial ZTN730A100AC decodes to 2010 or 1998 or 1986 or 1974 or 1960 (December).
- The 1944 to present format is ambiguous: Year letter repeats every 12 years - narrow with ANSI date, condition, model era. Post-2013 assignments are extrapolated, not sourced. Same system as GE/Hotpoint/Cafe/Monogram appliances (batch 12).
- GE Zoneline's official lookup at geappliances.com returns warranty / registration lookup.
Format eras
- 1944 to present VERIFIED
AAA###A###AAletter 2, 12-year cycle: A=2013/2001/1989/1977 D=2002/1990/1978 F=2003/1991/1979 G=2004/19
How to read the serial
1944 to present formatVERIFIED
Shape AAA###A###AA · example ZTN730A100AC · confidence high
- Year
- letter 2, 12-year cycle: A=2013/2001/1989/1977 D=2002/1990/1978 F=2003/1991/1979 G=2004/1992/1980 H=2005/1993/1981 L=2006/1994/1982/1970 M=2007/1995/1983/1971 R=2008/1996/1984 S=2009/1997/1985 T=2010/1998/1986/1974/1960 V=2011/1999/1987/1975 Z=2012/2000/1988/1976; odd letters B C E J K N P = 1940s-1970s one-offs; 1961-68 used two-letter codes VU WV XW YX AY BZ CA DB. Extrapolated (unverified): D=2014 F=2015 G=2016 H=2017 L=2018 M=2019 R=2020 S=2021 T=2022 V=2023 Z=2024 A=2025 D=2026
- Week or month
- month = letter 1: A=Jan D=Feb F=Mar G=Apr H=May L=Jun M=Jul R=Aug S=Sep T=Oct V=Nov Z=Dec
- Plant
- remaining chars = factory codes (5-6 chars on older units)
| Year code | Year(s) |
|---|---|
| B | 1945 |
| C | 1946 |
| J | 1952 |
| K | 1953 |
| VU | 1961 |
| WV | 1962 |
| XW | 1963 |
| YX | 1964 |
| AY | 1965 |
| BZ | 1966 |
| CA | 1967 |
| DB | 1968 |
| E | 1969, 1948 |
| N | 1972, 1956 |
| P | 1973, 1957 |
| D | 2002, 1990, 1978, 1947 |
| F | 2003, 1991, 1979, 1949 |
| G | 2004, 1992, 1980, 1950 |
| H | 2005, 1993, 1981, 1951 |
| L | 2006, 1994, 1982, 1970, 1954 |
| M | 2007, 1995, 1983, 1971, 1955 |
| R | 2008, 1996, 1984, 1958 |
| S | 2009, 1997, 1985, 1959 |
| T | 2010, 1998, 1986, 1974, 1960 |
| V | 2011, 1999, 1987, 1975 |
| Z | 2012, 2000, 1988, 1976 |
| A | 2013, 2001, 1989, 1977, 1944 |
| Month code | Month |
|---|---|
| A | January |
| D | February |
| F | March |
| G | April |
| H | May |
| L | June |
| M | July |
| R | August |
| S | September |
| T | October |
| V | November |
| Z | December |
Example: serial ZTN730A100AC decodes to 2010 or 1998 or 1986 or 1974 or 1960 (December).
Listed under GE Zoneline (PTAC) in the source; GE Zoneline 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 PTAC
Slide the chassis out of its wall sleeve or lift the front cover: the plate is on the chassis frame or on the side of the unit.
General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.
Open the official GE Zoneline 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
- GE Zoneline is treated as sharing GE Zoneline (PTAC)'s format because the source lists it in that family; the corporate relationship itself is an estimate.
- Serial = month letter + year letter + factory codes (ZTN730A100AC = Dec, T = 2010/1998/1986/1974/1960). building-center credits the chart to geappliances.com/search/fast/infopast/10000722.htm. The 12-letter year cycle (A D F G H L M R S T V Z) repeats every 12 years; chart ends 2013, so 2014-2025 = D F G H L M R S T V Z A by extrapolation (flagged). zoneline warranty.htm = 200 (warranty text, no lookup); geappliances.com age-of-appliance page 404.
Sources
- https://www.building-center.org/zoneline-hvac-age/
- img: GENERAL-ELECTRIC-...-Style-1_-Date-Chart-1.jpg (transcribed; credited to geappliances.com infopast/10000722.htm)
- https://www.geappliances.com/ge/zoneline/warranty.htmofficial