Serial Number Date Code Reference (#100)



Using the chart below, a serial number of WC9876553 would have been built in the year 2000 and in the month of March.  A serial number beginning with KA would have been built in January of 1993.  The remainder of the serial is just a sequential number.

Year of Manufacture (1st Letter of Serial Number) Month of Manufacture (2nd Letter of Serial Number)
P=2017 A=January
N=2016 B=February
M=2015 C=March
L=2014 D=April
K=2013 E=May
J=2012 F=June
H=2011 G=July
G=2010 H=August
F=2009 J=September
E=2008 K=October
D=2007 L=November
C=2006 M=December
B=2005  
A=2004  
Z=2003  
Y=2002  
X=2001  
W=2000  
T=1999  
S=1998  
P=1997  
N=1996  
M=1995  

† 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, and N through Z

* Due to a computer error there were some OA serial water heaters manufactured. They were built in January of 1997.