Water Heater Warranty Information

4
HI-FIRE COMMERCIAL GAS (HF) thru 1986
OIL FIRED (G-O SERIES) thru 1986
POWER GAS (PG) thru 1986
A) 1965-1983 models coded with one letter,
followed by five numbers.
Example: M78013...Built in December of 1978
First letter indicates month produced.
The next two numbers indicate year produced.
The remaining three numbers are production codes.
1
ST
LETTER 1
ST
TWO NUMBERS
A = January 75 = 1975
B = February 76 = 1976
C = March 77 = 1977
D = April 78 = 1978
E = May 79 = 1979
F = June 80 = 1980
G = July 81 = 1981
H = August 82 = 1982
J = September 83 = 1983
K = October 84 = 1984
L = November 85 = 1985
M = December 86 = 1986
1984-Present models coded with eight numbers.
Example: 85040000...April, 1985
First two numbers indicate year produced.
The third and fourth numbers indicate the month produced.
The final four numbers are production codes.
DATA PLATE LOCATION:
A. Hi-Fire
Left of the gas valve.
B. Power Gas
Left of the gas valve.
C. Oil-Fired (G-O Series)
On the front of the jacket, at the top.
7/08–Printed in U.S.A.
MOD-U-POWER (MUP) 1978-1984
The Mod-U-Power has a single letter,
six number serial code.
Example: J-930001...Built in September of 1993
First letter indicates month produced.
Next two numbers indicate year produced.
The remaining numbers are production codes.
1
ST
LETTER 1
ST
& 2
ND
NUMBER
A = January 78 = 1978
B = February 79 = 1979
C = March 80 = 1980
D = April 81 = 1981
E = May 82 = 1982
F = June 83 = 1983
G = July 84 = 1984
H = August
I = September
J = October
K = November
L = December
1
ST
NUMBER 1
ST
LETTER
1 = January P = 1970
2 = February R = 1971
3 = March S = 1972
4 = April T = 1973
5 = May U = 1974
6 = June V = 1975
7 = July W = 1976
8 = August X = 1977
9 = September Y = 1978
10 = October Z = 1979
11 = November AA = 1980
12 = December BB = 1981
DATA PLATE LOCATION:
On the top left corner of Copper-Fin, from the front
controls.
COPPER-FIN
®
WATER HEATERS (CFW) 1968-1981
COPPER-FIN BOILERS (CFB) 1968-1981
The Copper-Fin heaters have a number followed
by a letter(s) then three numbers.
Example: 5Y013...Built in May 1978
First number indicates month produced.
Next letter(s) indicates year produced.
Final three numbers are production codes.
NOTE: All charts on this page are reference only.