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 COLUMN (FIRST DIGIT)

MONTH COLUMN (SECOND DIGIT)

G =

1990

A =

January

H =

1991

B =

February

J =

1992

C =

March

K =

1993

D =

April

L =

1994

E =

May

M =

1995

F =

June

N =

1996

G =

July

P =

1997*

H =

August

S =

1998

J =

September

T =

1999

K =

October

W =

2000

L =

November

X =

2001

M =

December

Y =

2002

   

Z =

2003

   

A =

2004

   

B =

2005

   

C =

2006

   

D =

2007

   

E =

2008

   

F =

2009

   

G =

2010

   

H =

2011

   

J =

2012

   

† 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.