Utica – How to determine the age or manufacture date
Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of HVAC equipment. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. For this reason if you find during your research that we may have erred please contact us. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. Email us information or pictures of data/nomenclature plates of the unit and we will attempt to assist you in your determinations. Email
Utica – January 2003 thru Present day
Serial Number format: UAA23456
(This serial number is fictitious).
Using the first, second and third digits UAA23456 you will find the month and year of manufacture. The second digit is the month of manufacture and first digit combined with the third digit is the year. This unit was manufactured in January, 2003.
Year of manufacture: UAA23456
Use the following chart to determine year.
U_A = 2003
U_B = 2004
U_C = 2005
U_D = 2006
U_E = 2007
U_F = 2008
U_G = 2009
Month of manufacture: UAA23456
Use the following chart to determine 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
Utica – January 1, 1979 thru 2002
Serial Number format: HT11826
This serial number was obtained from an actual unit during a service call.
Using the first and second digits HT11826 you will find the month and year of manufacture. The first digit is the month of manufacture and second digit is the year. This unit was manufactured in August of 1996.
Year of manufacture: HT11826
Use the following chart to determine year.
I = 1979
J = 1980
K = 1981
L = 1982
M = 1983
A = 1984
B = 1985
C = 1986
D = 1987
E = 1988
F = 1989
G = 1990
H = 1991
N = 1992
P = 1993
R = 1994
S = 1995
T = 1996
U = 1997
V = 1998
W = 1999
9 = January thru August 2000
X = September thru December 2000
Y = 2001
Z = 2002
Month of manufacture: HT11826
Use the following chart to determine 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
Utica – Prior to 1979
Serial Number format: 12-63
This serial number is fictitious
Prior to 1979 serial numbers consisted of the month and year, i.e. 12-63 (manufactured December 1963).