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  1. #1
    Join Date
    Mar 2007
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    Posts
    1,450

    Default Furnace Age Information

    • 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 70s 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 80s- 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: (1970s to present) the 4 #s after the last letter in the S# = wk/yr
      Example: CB5D302F099903346 = 1999
      (1955 to early 1970s) 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.

    • O = 80
    • T = 81
    • U = 82

    4) If S# = number than letter-4 numbers (1971-1979) In 70s 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

    • U_A = 2003
    • U_B = 2004
    • U_C = 2005
    • U_D = 2006
    • U_E = 2007
    • U_F = 2008
    • U_G = 2009
    • Westinghouse: 4th and 5th digits in S# = year (S# will start with letter)
      Example: GSD060700023 = 2006
    • 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
    • Williamson ThermoFlo: Goes by CP# Must call (800) 736-2378 or (800) 736-BEST
    • 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
      • A = 1971 or 1992
      • B = 1972 or 1993
      • C = 1973 or 1994
      • D = 1974 or 1995
      • E = 1975 or 1996
      • F = 1976 or 1997
      • G = 1977 or 1998
      • H = 1978 or 1999
      • I was not used
      • J = 1979 or 2000
      • K = 1980 or 2001
      • L = 1981 or 2002
      • M = 1982 or 2003
      • N = 1983 or 2004 (except October, November, and December. See below.)
      • O was not used
      • P = 1984
      • Q was not used
      • R = 1985
      • S = 1986
      • T = 1987
      • U was not used
      • V = 1988
      • W = 1999
      • X = 1990
      • 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


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  2. #2
    Join Date
    Mar 2007
    Location
    Connecticut
    Posts
    1,823

    Default Re: Furnace Age Information

    Thanks Brian, This link is also a good one. HVAC -PRODUCTION DATE/AGE | Building Intelligence Center


  3. #3
    Join Date
    Jul 2008
    Location
    Chicago
    Posts
    259

    Default Re: Furnace Age Information

    Quote Originally Posted by wayne soper View Post
    Thanks Brian, This link is also a good one. HVAC -PRODUCTION DATE/AGE | Building Intelligence Center
    Agreed. The website has some holes in its library but is a good resource and is my first stop for appliance ages when I am in doubt. The serial and model # examples they provide are idiot proof.

    Mike Lamb
    Inspection Connection, Inc.
    http://www.inspection2020.com/

  4. #4
    Join Date
    Oct 2012
    Location
    Burnaby, BC, Canada
    Posts
    10

    Default Re: Furnace Age Information

    Quote Originally Posted by wayne soper View Post
    Thanks Brian, This link is also a good one. HVAC -PRODUCTION DATE/AGE | Building Intelligence Center
    Thanks, you are super. This link is great help.


  5. #5
    Sky Jones's Avatar
    Sky Jones Guest

    Default Re: Furnace Age Information

    That is terrific info thanks for sharing.


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