York Serial Number Lookup
Whether it’s to find replacement parts, for warranty information or just so you know for reference later, knowing how to find and read your York HVAC unit’s serial number can be quite handy. Below, we’ll break down where you can locate your serial number and how to decipher it in our comprehensive guide.
Where is a York Serial Number Located?
Your serial number will be located on the data plate along with the model number. The data plate is often a sticker that’s on the exterior or interior of the unit.
How to Read a York Serial Number: 1971 - Oct. 2004
A York serial number from 1971 through October of 2004 is made up of 10 letters and digits. The first four figures are alphabetical letters that indicate the location of the manufacturer, the month and year of manufacture and the type of unit. These four digits follow a specific nomenclature system to succinctly provide this information. Finally, the last six digits are Sequence Numbers.
In order to understand the date codes and nomenclature system, refer to the breakdown below:
Location of Manufacture
- A—Addison
- B—Blackville
- C—Canada
- D—Medina
- M—Mad’ville
- N—Norman
- W—Wichita
- X—Mexico
- Y—York
Month of Manufacture
- A—January
- B—February
- C—March
- D—April
- E—May
- F—June
- G—July
- H—August
- K—September
- L—October
- M—November
Year of Manufacture
- A—1971 or 1992
- B—1972 or 1993
- C—1973 or 1994
- D—1974 or 1995
- E—1975 or 1996
- F—1976 or 1997
- G—1977 or 1998
- H—1978 or 1999
- J—1979 or 2000
- K—1980 or 2001
- L—1981 or 2002
- M—1982 or 2003
- N—1983 or 2004
- P—1984
- R—1985
- S—1986
- T—1987
- V—1988
- W—1989
- X—1990
- Y—1991
Unit Type
- M—Mfg. Basic Unit
- P—Purchased Basic Unit
- S—Mfg. Low Side Item
- T—Purchased Low Side Item
- Y—Mfg. Accessory
- Z—Purchased Accessory
- O—Filler
To illustrate how this serial number system should be interpreted, we’ll analyze this made-up example serial number: ADFM654321.
The first four figures, ADFM, indicate that the unit was manufactured in Addison during the month of April, either in 1976 or 1997, and it’s a manufacturing basic unit type.
How to Read a York Serial Number: Oct. 2004 - Present
A York serial number from October of 2004 to present day is made up of 10 figures. The first four figures are alphabetical letters and numbers that indicate the location month and year of manufacture. These four digits follow a specific nomenclature system to succinctly provide this information. Finally, the last six digits are Sequence Numbers.
In order to understand the date codes nomenclature system, refer to the breakdown below:
Location of Manufacture
- A—Apodaca
- N—Norman
- S—Source One
- W—Wichita
Month of Manufacture
- A—January
- B—February
- C—March
- D—April
- E—May
- F—June
- G—July
- H—August
- K—September
- L—October
- M—November
- N—December
Year of Manufacture
Unlike serial numbers from pre-2004, the year is represented through the 2nd and 4th digits. For example, a serial number with “S0F6” indicates that the model was manufactured in ‘06, or 2006.
To illustrate how this serial number system should be interpreted, we’ll analyze this made-up example serial number: W1G7123456.
The first four figures, W1G7, indicate that the unit was manufactured in Wichita in July of 2017.
For more helpful serial number information, check out our Serial Number Lookup tool to help you find the right part for your unit.