JennAir Serial Number Lookup — Find Your JennAir Appliance Age

Editorial & technical review

Written by ApplianceWorth Editorial Team
Technically reviewed by Victor — appliance technician
Applies to JennAir appliances
Date formats covered 4
Sources Manufacturer service documentation, field-repair experience and owner-confirmed serial numbers · Methodology · Report a correction

How JennAir serial numbers encode the date

JennAir does not print the manufacture date in plain text on most units — it is encoded into the serial number. The decoder recognises 4 formats for this brand:

Shared scheme: JennAir appliances are built by Whirlpool, and use the same serial-number date format as Whirlpool. The codes below are Whirlpool’s documented tables — we are reusing them rather than presenting them as separately verified for JennAir.

Format 1: Repeating year code with production week

The 2nd character is the year code, followed by 2 digits at the 3rd character giving the production week of that year.

Applies to serial numbers 4–9 characters long.

Year code	Means
0	1970 · 1980 · 2010
1	1971 · 1981 · 2011
2	1972 · 1982 · 2012
3	1973 · 1983 · 2013
4	1974 · 1984 · 2014
5	1975 · 1985 · 2015
6	1976 · 1986 · 2016
7	1977 · 1987 · 2017
8	1978 · 1988 · 2018
9	1979 · 1989 · 2019
K	2000
L	2001
M	2002
P	2003
R	2004
S	2005
T	2006
U	2007
W	2008
Y	2009

Format 2: Repeating year code with production week

The 2nd character is the year code, followed by 2 digits at the 3rd character giving the production week of that year.

Applies to serial numbers 4–9 characters long.

Year code	Means
X	1990 · 2020
A	1991 · 2021
B	1992 · 2022
C	1993 · 2023
D	1994 · 2024
E	1995 · 2025
F	1996 · 2026
G	1997 · 2027
H	1998 · 2028
J	1999 · 2029

Format 3: Repeating year code with production week

The 3rd character is the year code, followed by 2 digits at the 4th character giving the production week of that year.

Applies to serial numbers of at least 10 characters.

Year code	Means
0	1970 · 1980 · 2010
1	1971 · 1981 · 2011
2	1972 · 1982 · 2012
3	1973 · 1983 · 2013
4	1974 · 1984 · 2014
5	1975 · 1985 · 2015
6	1976 · 1986 · 2016
7	1977 · 1987 · 2017
8	1978 · 1988 · 2018
9	1979 · 1989 · 2019
K	2000
L	2001
M	2002
P	2003
R	2004
S	2005
T	2006
U	2007
W	2008
Y	2009

Format 4: Repeating year code with production week

The 3rd character is the year code, followed by 2 digits at the 4th character giving the production week of that year.

Applies to serial numbers of at least 10 characters.

Year code	Means
X	1990 · 2020
A	1991 · 2021
B	1992 · 2022
C	1993 · 2023
D	1994 · 2024
E	1995 · 2025
F	1996 · 2026
G	1997 · 2027
H	1998 · 2028
J	1999 · 2029

Why the year can be ambiguous

JennAir reuses the same year character across repeating cycles, so one character on its own cannot pin down an absolute year. When that happens the tool picks the most recent year that has already occurred, marks the result medium confidence, and lists the other years the same code could mean.

How to settle it: if you know roughly when the appliance was bought, or the property it came with was built, pick the candidate year closest to that. A unit still in service is far more likely to be from the most recent cycle — but not always, which is exactly why we show you the alternatives instead of hiding them.

Where to find the JennAir serial number

The serial number is printed on the rating label, usually alongside the model number. Depending on the appliance it may be inside the door frame, under the lid, behind a drawer or on the rear panel. Our label location guide shows where to look for each appliance type.

JennAir is a trademark of its respective owner. ApplianceWorth is independent and not affiliated with or endorsed by any manufacturer.