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Air Conditioner Date Codes


Goodman Date Codes

The 1st and 2nd digits of the serial number are the year.
The 3rd and 4th digits of the serial number are the month.

Goodman AC Tag
Goodman: Model No.: CKJ60-1, SN: 0107415182, was manufactured in 2001, July.
Goodman AC Tag
Goodman: Model No.: GSC130481AA, SN: 0606111539 was manufactured in 2006, June.

International Comfort Products (ICP)

International Comfort Products is headquartered in Lewisburg, TN. They are part of Carrier Corporation, which is a unit of United Technologies Corp. In the serial number, the first letter is the place of manufacturer. The first pair of numbers is the year, and the second pair of numbers is the week.

Lennox Air Conditioner Tag 2012
For Example, Model No.: NAC042AKA5, SN: E031136011 was Manufactured in 2003, Week 11.

Lennox Date Codes

Since 1974, the first and second digits are the manufacturing plant; the 3rd and 4th are the decade and year, and the 5th digit is the month (skipping 'i'- see table below).

Code Month
A January
B February
C March
D April
E May
F June
G July
H August
J September
K October
L November
M December
Lennox Air Conditioner Tag 2012
For Example, My Lennox Heat Pump Model No.: 14HPX-030-230-18, SN: 1912H09467 was Manufactured in 2012, August.

Payne Date Codes

The 1st and 2nd digits of the serial number are the week
The 3rd and 4th digits of the serial number are the year.

Payne AC Tag
Payne: Model No.: PA10JA060-C, SN: 3203E08663, was manufactured in 2003, Week 32.

Trane Date Codes

Since at least 2000, Trane has been putting the manufactured date in English on the Tag.
Since 2002, the first two numbers of the serial number are the decade and the year it was manufactured.
Before 2002, the first letter of the serial number indicated the year it was manufactured as given by the table:

The next two numbers are the week, it was manufactured.

Trane Date Codes
Code Year Code Year
O,A 1980 F 1991
T 1981 G 1992
U 1982 H 1993
W 1983 J 1994
X 1984 K 1995
Y 1985 L 1996
S 1886 M 1997
B 1987 N 1998
C 1988 P 1999
D 1989 R 2000
E 1990 Z 2001

The second alpha character (not necessarily the second digit) in the model number will either be a T or a W: T = cooling, W = heat pump.

Trane Air Conditioner Tag 2002
For Example, Trane Air Conditioner Model No.: TTB036C100A2 with SN: R4628MEBF was Manufactured in 2000, week 46 (F06-010).
Trane Air Conditioner Tag 2017
For Example, My Trane Heat Pump, Model No.: 4TWR4036G1000AA, SN: 17103N6M4F was Manufactured in 2017, week 10 (F06-010).