Bradford White EF120T4003NA3 Service Manual page 3

Determining the Age of Your Water Heater
The first two characters of the serial number represent the year and month of manufacture. The
remainder of the serial is a sequential production number, seven digits in length before December
2007 (DM), and eight digits in length after.
Production Year
A = 1984 or 2004
B = 1985 or 2005
C = 1986 or 2006
D =1987 or 2007
E = 1988 or 2008
F = 1989 or 2009
G = 1990 or 2010
H = 1991 or 2011
J = 1992 or 2012
K = 1993 or 2013
For the year column, we do not use the letters: I, O, Q, R U, V
For the month column we do not use the letters: I & N – Z
Due to a computer error there were some OA serial water heaters manufactured. They were built in
This Service Manual is ONLY for ICON Control Systems (Serial Numbers XC and later). Please
L = 1994 or 2014
M = 1995 or 2015
N = 1996 or 2016
P = 1997 or 2017
S = 1998 or 2018
T = 1999 or 2019
W = 2000 or 2020
X = 2001 or 2021
Y =2002 or 2022
Z = 2003 or 2023
January of 1997
make sure that your water heater falls within this range.
For example:
A = January
B = February
C = March
D =April
E = May
F = June
.
NOTICE
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Production Month
G = July
H = August
J = September
K = October
L = November
M = December
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