Brian Hannigan
07-24-2013, 01:04 PM
Amana (1971-1995 Now owned by Goodman) uses (1st letter) “B L A C K H O R S E” code prior to being owned by Goodman
Example: BB80200127 = 1971 or 1981
B-71,81,91,01
L-72,82,92,02
A-73,83,93,03
C-74,84,94,04
K-75,85,95,05
H-76,86,96,06
O-77,87,97,07
R-78,88,98,08
S-79,89,99,09
E-80,90,00,10
AirTemp 5th digit in S# = year (Only manufactured in 1977-1978)
Airquest A letter followed by two #’s in S# are year.
Example: R883512345 = 1988
American Standard (date on plate since 1987)
1) If S# is 9 numbers than (2002-present), the first digit of the serial number is the year followed by the week.
Example: 7165RHAIG = 16th week of 2007
2) If S# starts with a letter (1983-2001) a letter was used in the first position to designate the year followed by the week.
Example: B50632891 = Dec 87
W = 83
X = 84
Y = 85
S = 86
B = 87
C = 88
D = 89
E = 90
F = 91
G = 92
H = 93
J = 94
K = 95
L = 96
M = 97
N = 98
P = 99
R = 00
Z = 01.
3) If S # is 6 numbers than a letter (1980-1982), 1980, 1981, 1982 the year is a letter in the 7th place. O = 80, T = 81, U = 82
4) If S# is number letter-4 numbers (1971-1979) In 70’s there was a number for year followed by letter for month ex 1C-xxxx = March 1971, etc..
Arco-aire: A letter followed by two #’s in the S# = year ex: R883512345 = 1988
Aire-Flo: 3rd and 4th digit in S# = Year ex 4604E13679 = 2004
Armstrong: (1974-Present) 3rd and 4th number in S# = year ex 5899A05231 = 1999
Pre 1974 it was the first two numbers in the S# can call 800 448-5872 or 972-497-5799 (most are stamped on – See Lennox)
Bard: ( June 1980 to Current) 5th & 6th digits in S# = Year
Example: 123A91123454502 = 1991
(1962 to March 1980) 8th digit = year.
Example: 123456 A D (D= 1964)
1962 = B
1963 = C
1964 = D
1965 = E
1966 = F
1967 = G
1968 = H
1970 = K
1971 = L
1972 = M
1973 = N
1974 = O
1975 = P
1976 = R
1977 = S
1978 = T
1979 = U
1980 = V
Broan: (since 2005) 4th and 5th digits in S# = year (S# will start with letter)
Example: GT3050153269 = 2005
Bryant: see Carrier
Burnham: Must Call 888-432-8887
Buderus: 2 types 603-552-1100
1) If order is like: 63036333-00-7080-3241
The third series of numbers is the Manufacture date- this tank was manufactured on the 80th day of 2007, so the first digit signifies the year and the next three signify the day of the year -
Example: 005, 065, 365
2)If order is like: 253000-08065-00040-77470007254 The second sequence is the year and day of the year the product was manufactured so-65th day of 2008.
Carrier, Bryant, Payne, Day & Night:
Recently (last 20 years or so) 3rd and 4th digits in S# = year Through 1969, the first digit of the serial number indicates the year of manufacture.
Example: 3xxxxxx = 1963, 1970 and later, a letter followed by a number indicates the month and year of manufacture.
Example: A1 = January 1971, B1 = February 1971, C4 = March 1974 etc.
Central Environmental Systems: see York
Chrysler Air Temp: 2 types
1)Age is shown by the first digit of the serial number and corresponds to the last number of the year of manufacturer.
Example 0C893745 = 1970. 1 = 1971, 2 = 1972, etc. Use common sense and visual observation to distinguish decades from one another.
2) 5th digit in S# = year (8 = 1978)
Climatrol: Call 817-221-3259
Climate Master: First two digits of S# = Year
Example: 92J010915 = 1992
Coleman: (1992-present) 1st two digits in S# = year , (pre 1992) 3rd and 4th digits in S# = year
Columbia: Call 610-473-8457
Comfortmaker: A letter followed by two #’s in S# = year ex: R883512345 = 1988
Concord: 3rd and 4th digits in S# = year 1-800-448-5872
Conquest: 1st two digits in S# after the last letter (usually beginning with the 8th digit) = year
Day-Night: (since 1979 see Carrier) (Prior to BDP in Pre1979) Age coded into the serial number. First letter is the month followed by the second letter which is the year. A = 1970, B = 1971, Etc.
Example: AAxxxxxx = January 1970
Dayton: A letter followed by two #’s in the S# = year
Example: R883512345 = 1988
Ducane: 2 Types:
1) If serial # is all #’s then last four are year and week
Example: 4140720320 = 20th week of 2003
2) If 5th character is a letter (more recent) year is 3rd and 4th character
Example: 4603M12345 is 46th week of 2003
Dunkirk: 3rd and 4th digits in S# = year
Enterprise Fawcett: 2nd letter in S# = year
A- 1975-2001
B- 1976-2002
C- 1977-2003
D- 1978-2004
E- 1979-2005
F- 1980-2006
G- 1981-2007
H- 1982-2008
I- 1983-2009
J- 1984-2010
K- 1985-2011
L- 1986-2012
M- 1987-2013
N- 1988-2014
O- 1989-2015
P- 1990-2016
Q- 1991-2017
R- 1992-2018
S- 1993-2019
T- 1994-2020
U- 1995-2021
V- 1996-2022
W- 1997-2023
X- 1998-2024
Y- 1999-2025
Z- 2000-2026
Evcon: (1992-present) 3rd and 4th digits in S# = year (pre 1992) 1st two digits in S# = year
Fedders: Through 1977, the last two letters of the serial number show the month/year of manufacture, beginning with September 1964.
Example: xxxxAA = Sept 66, xxxxBC = Oct 68.(I is not used)
First Company Service Parts: Call 214-388-5751
Fraser: See York
Frigidaire: (since 1998) 4th and 5th digit in S# = year, (pre 1989) last 3 digits in S# = year and month. See Nordyne
General Electric: (Stopped in mid 80’s- Trane Since) Age is the last 3 digits of the serial number. First digit being the year and the second and third digits being the month.
Example xxxxx241 = 41st week of 1982, 92, 02 etc., xxxxx533 = 33rd week of 1985, 95, 05 etc.. Not very reliable. Look for evidence of age
Gibson: 1st two Numbers in S# = year (usually 1st two digits in S# are numbers and = year) or see Nordyne
Goodman: 1st two digits in S# = year (usually 1st two digits in S# are numbers and = year)
Grandaire: 4th and 5th digit in S# = year
Example: GS3991251776 = 1999
Heat Controller: 2nd and 3rd digits in S# = year
Example: 28903 160610 = 1989
H.B. Smith: 1st two numbers (usually after one letter) in S# = year
Example: D86 2810P = 1986
Heil (and Heil Quaker): 2 styles
1) (1994 to present) A letter followed by two #’s in S# = year
Example: R883512345 = 1988
2) (1980-1994) 1st two digits in S#, First letter is first number, so H7 I= 1987 (since H is the 8th letter in alphabet)
Hydraulics Institute CAC/BDP: 3rd and 4th digits in S# = year
Hydro Therm: The middle 4 numbers in the S# = year 413-564-5515
Inter City: 1st two digits in S# = year
Intertherm: 4th and 5th digits in S# = year (S# will start with letter)
International Comfort Products: A letter followed by two #’s in S# are year
Example: R883512345 = 1988 May also be stamped on label
Janitrol: 1st two digits in S# = year
Johnson: see York
Keeprite: 3 types
1) (1994-present)A letter followed by two #’s in S# = year.
Example: R883512345 = 1988
2) (1980-1993) 1st digit in S# = year
Example: 305123456 = 1983 or 1993
3) (1970-1994) The last letter in first series of letters = year
S = 1970
T = 1971
U = 1972
V = 1973
W = 1974
X = 1975
Y = 1976
Z = 1977
A = 1978
B = 1979
C = 1980
D = 1981
E = 1982
F = 1983
G = 1984
H = 1985
“I” was not used
J = 1986
K = 1987
L = 1988
M = 1989
N = 1990
O = 1991
P = 1992
Q = 1993
R = 1994
Kelvinator: 4th and 5th digits in S# = year (S# will start with letter)
Kenmore: 2 types (1994-present)
1) A letter followed by two #’s in S# are year
Example: R883512345 = 1988
2) (1980-1989) The first digit (a letter) is decade followed by a number
Example: H61139301 = 1986
Lennox: (1974-Present) 3rd and 4th number in S# = year Pre 1974 it was the first two numbers in the S#
Many are stamped on label
800-448-5872 or 972-497-5799
Lincoln: A letter followed by two #’s in the S# are year
Example: R883512345 = 1988
Luxaire: see York
Mammoth: see Nordyne (800) 222-4328
Magic Chef: (only manufactured from 1984-1998) 8th digit (a letter usually second to last) = year.
Example: I04509EEB = 1984 (E-=1984)
A = 1980
B = 1981
C = 1982
D = 1983
E = 1984
F = 1985
G = 1986
H = 1987
“I” was not used
J = 1988
K = 1989
L = 1990
M = 1991
N = 1992
O = 1993
P = 1994
Q = 1995
R = 1996
S = 1997
T = 1998
Magic Pak: (1974 - Present) 3rd and 4th digit in S# = year
Maytag: (only since 2002) see Nordyne
Miller: see Nordyne (800) 222-4328
Modine: 3rd and 4th digits in S# = year (1st 2 are week, if week is 1-9 than the year is 2nd and 3rd digit in S# - [no 01,02 etc])
Montgomery Ward: 1st four numbers after last letter in S# = week and year
Example: KP30102F52756585 =1975
NEWMAC: 4th and 5th digit in S# = year
Example: NL2 021803 D036000 = 2002
New Yorker: usually printed on label or see Oneida Royal
Nordyne: (800) 222-4328: 4th and 5th digits in S# = year (S# will start with letter)
Example: GT3050153269 = 2005
NuTone: see Nordyne (800) 222-4328
Oneida Royal: 1st two digits in S# = year
Payne: see Carrier
Peerless: (pre 1984 no date of manufacture) (1984-2000) the last series of numbers are month and year.
Example: JO-12345-1084 = 1984. (2000-present)
same idea only it was a six digit date code following the serial number that is year and month.
Example: 1234567-200105 = May of 2001. Anything w/o the addition to the serial number would have been made before 1984 and would require contact with the factory.
Pennco: A letter followed by 4 #’s, 3rd and 4th #’s = year
Example: P390200032 = 2002
Penstan Air-ease: 3rd and 4th digits in S# = year
Example: 8404506602 = 2004
Philco: See Nordyne
Republic: 1st four numbers after last letter in S# = week and year
Example: DC5D702F280123456 = 2001
Reznor Call 1800-695-1901 (chart at home)
Rheem/Ruud: (1970’s to present) the 4 #’s after the last letter in the S# = wk/yr
Example: CB5D302F099903346 = 1999
(1955 to early 1970’s) the last 4 numbers of S# = week and year
Example: 123451872 = 1972
Rinnai: 1st two digits in S# = year
ex 010912345 = 2001
Sears: 3 types
1) A letter followed by two #’s in S# are year
Example: : R883512345 = 1988
2) (1980-1989) The first digit (a letter) is decade followed by a number
Example: H61139301 = 1986
3) If S# is all #’s, 3rd and 4th are year
Example: 22880018 = 1988
Slant Fin: 1st two #’s after the letter in S# = year
Example: G0049257 = 2000
Snyder General: A letter followed by two #’s = year
Example: R883512345 = 1988
Tappan: Last two #’s in S # = year (then a letter for month) or See Nordyne
Tempstar: (1990-present) A letter followed by two #’s in S# = year
Example: R883512345 = 1988
Thermo-Pride: Must call 574 896-2133
Trane: (date on plate since 1987)
1) If S# is 9 numbers than (2002-present), the first digit of the serial number is the year followed by the week.
Example: 7165RHAIG = 16th week of 2007
2) If S# starts with a letter (1983-2001) a letter was used in the first position to designate the year followed by the week.
Example: B50632891 = Dec 87
W = 83
X = 84
Y = 85
S = 86
B = 87
C = 88
D = 89
E = 90
F = 91
G = 92
H = 93
J = 94
K = 95
L = 96
M = 97
N = 98
P = 99
R = 00
Z = 01
3) If S # is 6 numbers than a letter (1980-1982), 1980, 1981, 1982 the year is a letter in the 7th place.
[*=1]O = 80
[*=1]T = 81
[*=1]U = 82
4) If S# = number than letter-4 numbers (1971-1979) In 70’s there was a number for year followed by letter for month
Example: 1C-xxxx = March 1971, etc..
Ultimate: Last two digits in S# = Year
Union Energy: 3rd and 4th digits are year
Example: 2701E15232 = 2001
Utica Boiler: 2 types
1) (1979-2002) 1st letter = month, 2nd letter = year
Example: HT11826 = 2006
I=79
J=80
K=81
L=82
M=83
A=84
B=85
C=86
D=87
E=88
F=89
G=90
H=91
P=93
R=94
S=95
T=96
U=97
V =98
W=99
X=00
Y=01
Z=02
UA=03
2) (2003-present) 1st and 3rd letter of S# = year
Example: UAA23456 = 2006
[*=1]U_A = 2003
[*=1]U_B = 2004
[*=1]U_C = 2005
[*=1]U_D = 2006
[*=1]U_E = 2007
[*=1]U_F = 2008
[*=1]U_G = 2009
[*=1]Westinghouse: 4th and 5th digits in S# = year (S# will start with letter)
Example: GSD060700023 = 2006
[*=1]Whirlpool: Begins in 1970. The letter indicates the decade followed by the week. G = 1970's, H=1980's, J=1990's, K=2000's
Example: H416XXXXX = 16th week of 1984
[*=1]Williamson ThermoFlo: Goes by CP# Must call (800) 736-2378 or (800) 736-BEST
[*=1]YORK: (Unitary Products since 1984) (most have date on plate) Call 877 874-7378 or 188 231-4822
1) (2004-Present) 1st and 3rd # in S# = year Example: 0A5123456 = 2005
2) (1971-2004) The 3rd digit (a letter) = year
Example: EFBM210830 = 1972 or 1993
[*=1]A = 1971 or 1992
[*=1]B = 1972 or 1993
[*=1]C = 1973 or 1994
[*=1]D = 1974 or 1995
[*=1]E = 1975 or 1996
[*=1]F = 1976 or 1997
[*=1]G = 1977 or 1998
[*=1]H = 1978 or 1999
[*=1]I was not used
[*=1]J = 1979 or 2000
[*=1]K = 1980 or 2001
[*=1]L = 1981 or 2002
[*=1]M = 1982 or 2003
[*=1]N = 1983 or 2004 (except October, November, and December. See below.)
[*=1]O was not used
[*=1]P = 1984
[*=1]Q was not used
[*=1]R = 1985
[*=1]S = 1986
[*=1]T = 1987
[*=1]U was not used
[*=1]V = 1988
[*=1]W = 1999
[*=1]X = 1990
[*=1]Y = 1991
Water Furnace: 3rd and 4th digits in WO# = year
Weil-McLain: CP # Ranges
2009= 5957347
2008= 5731064 5957346
2007= 5454498 5731063
2006= 5301001 5454497
2005= 5047001 5301000
2004= 4807001 5047000
2003= 4587000 4807000
2002= 4311001 4586999
2001= 4055001 4311000
2000= 3810001 4055000
1999= 3621001 3810000
1998= 3441401 3621000
1997= 3213001 3441400
1996= 3003001 3213000
1995= 2815001 3003000
1994= 2609501 2815000
1993= 2400000 2609500
1992= 2217400 2399999
1991= 2056001 2217399
1990= 1871501 2056001
1989= 1681501 1871500
1988= 1414001 1681500
Example: BB80200127 = 1971 or 1981
B-71,81,91,01
L-72,82,92,02
A-73,83,93,03
C-74,84,94,04
K-75,85,95,05
H-76,86,96,06
O-77,87,97,07
R-78,88,98,08
S-79,89,99,09
E-80,90,00,10
AirTemp 5th digit in S# = year (Only manufactured in 1977-1978)
Airquest A letter followed by two #’s in S# are year.
Example: R883512345 = 1988
American Standard (date on plate since 1987)
1) If S# is 9 numbers than (2002-present), the first digit of the serial number is the year followed by the week.
Example: 7165RHAIG = 16th week of 2007
2) If S# starts with a letter (1983-2001) a letter was used in the first position to designate the year followed by the week.
Example: B50632891 = Dec 87
W = 83
X = 84
Y = 85
S = 86
B = 87
C = 88
D = 89
E = 90
F = 91
G = 92
H = 93
J = 94
K = 95
L = 96
M = 97
N = 98
P = 99
R = 00
Z = 01.
3) If S # is 6 numbers than a letter (1980-1982), 1980, 1981, 1982 the year is a letter in the 7th place. O = 80, T = 81, U = 82
4) If S# is number letter-4 numbers (1971-1979) In 70’s there was a number for year followed by letter for month ex 1C-xxxx = March 1971, etc..
Arco-aire: A letter followed by two #’s in the S# = year ex: R883512345 = 1988
Aire-Flo: 3rd and 4th digit in S# = Year ex 4604E13679 = 2004
Armstrong: (1974-Present) 3rd and 4th number in S# = year ex 5899A05231 = 1999
Pre 1974 it was the first two numbers in the S# can call 800 448-5872 or 972-497-5799 (most are stamped on – See Lennox)
Bard: ( June 1980 to Current) 5th & 6th digits in S# = Year
Example: 123A91123454502 = 1991
(1962 to March 1980) 8th digit = year.
Example: 123456 A D (D= 1964)
1962 = B
1963 = C
1964 = D
1965 = E
1966 = F
1967 = G
1968 = H
1970 = K
1971 = L
1972 = M
1973 = N
1974 = O
1975 = P
1976 = R
1977 = S
1978 = T
1979 = U
1980 = V
Broan: (since 2005) 4th and 5th digits in S# = year (S# will start with letter)
Example: GT3050153269 = 2005
Bryant: see Carrier
Burnham: Must Call 888-432-8887
Buderus: 2 types 603-552-1100
1) If order is like: 63036333-00-7080-3241
The third series of numbers is the Manufacture date- this tank was manufactured on the 80th day of 2007, so the first digit signifies the year and the next three signify the day of the year -
Example: 005, 065, 365
2)If order is like: 253000-08065-00040-77470007254 The second sequence is the year and day of the year the product was manufactured so-65th day of 2008.
Carrier, Bryant, Payne, Day & Night:
Recently (last 20 years or so) 3rd and 4th digits in S# = year Through 1969, the first digit of the serial number indicates the year of manufacture.
Example: 3xxxxxx = 1963, 1970 and later, a letter followed by a number indicates the month and year of manufacture.
Example: A1 = January 1971, B1 = February 1971, C4 = March 1974 etc.
Central Environmental Systems: see York
Chrysler Air Temp: 2 types
1)Age is shown by the first digit of the serial number and corresponds to the last number of the year of manufacturer.
Example 0C893745 = 1970. 1 = 1971, 2 = 1972, etc. Use common sense and visual observation to distinguish decades from one another.
2) 5th digit in S# = year (8 = 1978)
Climatrol: Call 817-221-3259
Climate Master: First two digits of S# = Year
Example: 92J010915 = 1992
Coleman: (1992-present) 1st two digits in S# = year , (pre 1992) 3rd and 4th digits in S# = year
Columbia: Call 610-473-8457
Comfortmaker: A letter followed by two #’s in S# = year ex: R883512345 = 1988
Concord: 3rd and 4th digits in S# = year 1-800-448-5872
Conquest: 1st two digits in S# after the last letter (usually beginning with the 8th digit) = year
Day-Night: (since 1979 see Carrier) (Prior to BDP in Pre1979) Age coded into the serial number. First letter is the month followed by the second letter which is the year. A = 1970, B = 1971, Etc.
Example: AAxxxxxx = January 1970
Dayton: A letter followed by two #’s in the S# = year
Example: R883512345 = 1988
Ducane: 2 Types:
1) If serial # is all #’s then last four are year and week
Example: 4140720320 = 20th week of 2003
2) If 5th character is a letter (more recent) year is 3rd and 4th character
Example: 4603M12345 is 46th week of 2003
Dunkirk: 3rd and 4th digits in S# = year
Enterprise Fawcett: 2nd letter in S# = year
A- 1975-2001
B- 1976-2002
C- 1977-2003
D- 1978-2004
E- 1979-2005
F- 1980-2006
G- 1981-2007
H- 1982-2008
I- 1983-2009
J- 1984-2010
K- 1985-2011
L- 1986-2012
M- 1987-2013
N- 1988-2014
O- 1989-2015
P- 1990-2016
Q- 1991-2017
R- 1992-2018
S- 1993-2019
T- 1994-2020
U- 1995-2021
V- 1996-2022
W- 1997-2023
X- 1998-2024
Y- 1999-2025
Z- 2000-2026
Evcon: (1992-present) 3rd and 4th digits in S# = year (pre 1992) 1st two digits in S# = year
Fedders: Through 1977, the last two letters of the serial number show the month/year of manufacture, beginning with September 1964.
Example: xxxxAA = Sept 66, xxxxBC = Oct 68.(I is not used)
First Company Service Parts: Call 214-388-5751
Fraser: See York
Frigidaire: (since 1998) 4th and 5th digit in S# = year, (pre 1989) last 3 digits in S# = year and month. See Nordyne
General Electric: (Stopped in mid 80’s- Trane Since) Age is the last 3 digits of the serial number. First digit being the year and the second and third digits being the month.
Example xxxxx241 = 41st week of 1982, 92, 02 etc., xxxxx533 = 33rd week of 1985, 95, 05 etc.. Not very reliable. Look for evidence of age
Gibson: 1st two Numbers in S# = year (usually 1st two digits in S# are numbers and = year) or see Nordyne
Goodman: 1st two digits in S# = year (usually 1st two digits in S# are numbers and = year)
Grandaire: 4th and 5th digit in S# = year
Example: GS3991251776 = 1999
Heat Controller: 2nd and 3rd digits in S# = year
Example: 28903 160610 = 1989
H.B. Smith: 1st two numbers (usually after one letter) in S# = year
Example: D86 2810P = 1986
Heil (and Heil Quaker): 2 styles
1) (1994 to present) A letter followed by two #’s in S# = year
Example: R883512345 = 1988
2) (1980-1994) 1st two digits in S#, First letter is first number, so H7 I= 1987 (since H is the 8th letter in alphabet)
Hydraulics Institute CAC/BDP: 3rd and 4th digits in S# = year
Hydro Therm: The middle 4 numbers in the S# = year 413-564-5515
Inter City: 1st two digits in S# = year
Intertherm: 4th and 5th digits in S# = year (S# will start with letter)
International Comfort Products: A letter followed by two #’s in S# are year
Example: R883512345 = 1988 May also be stamped on label
Janitrol: 1st two digits in S# = year
Johnson: see York
Keeprite: 3 types
1) (1994-present)A letter followed by two #’s in S# = year.
Example: R883512345 = 1988
2) (1980-1993) 1st digit in S# = year
Example: 305123456 = 1983 or 1993
3) (1970-1994) The last letter in first series of letters = year
S = 1970
T = 1971
U = 1972
V = 1973
W = 1974
X = 1975
Y = 1976
Z = 1977
A = 1978
B = 1979
C = 1980
D = 1981
E = 1982
F = 1983
G = 1984
H = 1985
“I” was not used
J = 1986
K = 1987
L = 1988
M = 1989
N = 1990
O = 1991
P = 1992
Q = 1993
R = 1994
Kelvinator: 4th and 5th digits in S# = year (S# will start with letter)
Kenmore: 2 types (1994-present)
1) A letter followed by two #’s in S# are year
Example: R883512345 = 1988
2) (1980-1989) The first digit (a letter) is decade followed by a number
Example: H61139301 = 1986
Lennox: (1974-Present) 3rd and 4th number in S# = year Pre 1974 it was the first two numbers in the S#
Many are stamped on label
800-448-5872 or 972-497-5799
Lincoln: A letter followed by two #’s in the S# are year
Example: R883512345 = 1988
Luxaire: see York
Mammoth: see Nordyne (800) 222-4328
Magic Chef: (only manufactured from 1984-1998) 8th digit (a letter usually second to last) = year.
Example: I04509EEB = 1984 (E-=1984)
A = 1980
B = 1981
C = 1982
D = 1983
E = 1984
F = 1985
G = 1986
H = 1987
“I” was not used
J = 1988
K = 1989
L = 1990
M = 1991
N = 1992
O = 1993
P = 1994
Q = 1995
R = 1996
S = 1997
T = 1998
Magic Pak: (1974 - Present) 3rd and 4th digit in S# = year
Maytag: (only since 2002) see Nordyne
Miller: see Nordyne (800) 222-4328
Modine: 3rd and 4th digits in S# = year (1st 2 are week, if week is 1-9 than the year is 2nd and 3rd digit in S# - [no 01,02 etc])
Montgomery Ward: 1st four numbers after last letter in S# = week and year
Example: KP30102F52756585 =1975
NEWMAC: 4th and 5th digit in S# = year
Example: NL2 021803 D036000 = 2002
New Yorker: usually printed on label or see Oneida Royal
Nordyne: (800) 222-4328: 4th and 5th digits in S# = year (S# will start with letter)
Example: GT3050153269 = 2005
NuTone: see Nordyne (800) 222-4328
Oneida Royal: 1st two digits in S# = year
Payne: see Carrier
Peerless: (pre 1984 no date of manufacture) (1984-2000) the last series of numbers are month and year.
Example: JO-12345-1084 = 1984. (2000-present)
same idea only it was a six digit date code following the serial number that is year and month.
Example: 1234567-200105 = May of 2001. Anything w/o the addition to the serial number would have been made before 1984 and would require contact with the factory.
Pennco: A letter followed by 4 #’s, 3rd and 4th #’s = year
Example: P390200032 = 2002
Penstan Air-ease: 3rd and 4th digits in S# = year
Example: 8404506602 = 2004
Philco: See Nordyne
Republic: 1st four numbers after last letter in S# = week and year
Example: DC5D702F280123456 = 2001
Reznor Call 1800-695-1901 (chart at home)
Rheem/Ruud: (1970’s to present) the 4 #’s after the last letter in the S# = wk/yr
Example: CB5D302F099903346 = 1999
(1955 to early 1970’s) the last 4 numbers of S# = week and year
Example: 123451872 = 1972
Rinnai: 1st two digits in S# = year
ex 010912345 = 2001
Sears: 3 types
1) A letter followed by two #’s in S# are year
Example: : R883512345 = 1988
2) (1980-1989) The first digit (a letter) is decade followed by a number
Example: H61139301 = 1986
3) If S# is all #’s, 3rd and 4th are year
Example: 22880018 = 1988
Slant Fin: 1st two #’s after the letter in S# = year
Example: G0049257 = 2000
Snyder General: A letter followed by two #’s = year
Example: R883512345 = 1988
Tappan: Last two #’s in S # = year (then a letter for month) or See Nordyne
Tempstar: (1990-present) A letter followed by two #’s in S# = year
Example: R883512345 = 1988
Thermo-Pride: Must call 574 896-2133
Trane: (date on plate since 1987)
1) If S# is 9 numbers than (2002-present), the first digit of the serial number is the year followed by the week.
Example: 7165RHAIG = 16th week of 2007
2) If S# starts with a letter (1983-2001) a letter was used in the first position to designate the year followed by the week.
Example: B50632891 = Dec 87
W = 83
X = 84
Y = 85
S = 86
B = 87
C = 88
D = 89
E = 90
F = 91
G = 92
H = 93
J = 94
K = 95
L = 96
M = 97
N = 98
P = 99
R = 00
Z = 01
3) If S # is 6 numbers than a letter (1980-1982), 1980, 1981, 1982 the year is a letter in the 7th place.
[*=1]O = 80
[*=1]T = 81
[*=1]U = 82
4) If S# = number than letter-4 numbers (1971-1979) In 70’s there was a number for year followed by letter for month
Example: 1C-xxxx = March 1971, etc..
Ultimate: Last two digits in S# = Year
Union Energy: 3rd and 4th digits are year
Example: 2701E15232 = 2001
Utica Boiler: 2 types
1) (1979-2002) 1st letter = month, 2nd letter = year
Example: HT11826 = 2006
I=79
J=80
K=81
L=82
M=83
A=84
B=85
C=86
D=87
E=88
F=89
G=90
H=91
P=93
R=94
S=95
T=96
U=97
V =98
W=99
X=00
Y=01
Z=02
UA=03
2) (2003-present) 1st and 3rd letter of S# = year
Example: UAA23456 = 2006
[*=1]U_A = 2003
[*=1]U_B = 2004
[*=1]U_C = 2005
[*=1]U_D = 2006
[*=1]U_E = 2007
[*=1]U_F = 2008
[*=1]U_G = 2009
[*=1]Westinghouse: 4th and 5th digits in S# = year (S# will start with letter)
Example: GSD060700023 = 2006
[*=1]Whirlpool: Begins in 1970. The letter indicates the decade followed by the week. G = 1970's, H=1980's, J=1990's, K=2000's
Example: H416XXXXX = 16th week of 1984
[*=1]Williamson ThermoFlo: Goes by CP# Must call (800) 736-2378 or (800) 736-BEST
[*=1]YORK: (Unitary Products since 1984) (most have date on plate) Call 877 874-7378 or 188 231-4822
1) (2004-Present) 1st and 3rd # in S# = year Example: 0A5123456 = 2005
2) (1971-2004) The 3rd digit (a letter) = year
Example: EFBM210830 = 1972 or 1993
[*=1]A = 1971 or 1992
[*=1]B = 1972 or 1993
[*=1]C = 1973 or 1994
[*=1]D = 1974 or 1995
[*=1]E = 1975 or 1996
[*=1]F = 1976 or 1997
[*=1]G = 1977 or 1998
[*=1]H = 1978 or 1999
[*=1]I was not used
[*=1]J = 1979 or 2000
[*=1]K = 1980 or 2001
[*=1]L = 1981 or 2002
[*=1]M = 1982 or 2003
[*=1]N = 1983 or 2004 (except October, November, and December. See below.)
[*=1]O was not used
[*=1]P = 1984
[*=1]Q was not used
[*=1]R = 1985
[*=1]S = 1986
[*=1]T = 1987
[*=1]U was not used
[*=1]V = 1988
[*=1]W = 1999
[*=1]X = 1990
[*=1]Y = 1991
Water Furnace: 3rd and 4th digits in WO# = year
Weil-McLain: CP # Ranges
2009= 5957347
2008= 5731064 5957346
2007= 5454498 5731063
2006= 5301001 5454497
2005= 5047001 5301000
2004= 4807001 5047000
2003= 4587000 4807000
2002= 4311001 4586999
2001= 4055001 4311000
2000= 3810001 4055000
1999= 3621001 3810000
1998= 3441401 3621000
1997= 3213001 3441400
1996= 3003001 3213000
1995= 2815001 3003000
1994= 2609501 2815000
1993= 2400000 2609500
1992= 2217400 2399999
1991= 2056001 2217399
1990= 1871501 2056001
1989= 1681501 1871500
1988= 1414001 1681500