# lennox age **URL:** \ **Category:** Inspecting HVAC Systems\ **Created:** [September 2, 2006, 3:56pm UTC](https://forum.nachi.org/t/lennox-age/7123 "2006-09-02T15:56:02Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![rcantrell](https://avatars.discourse-cdn.com/v4/letter/r/8e7dd6/32.png) [@rcantrell](https://forum.nachi.org/u/rcantrell)\ **Post date:** [September 2, 2006, 3:56pm UTC](https://forum.nachi.org/t/lennox-age/7123/1 "2006-09-02T15:56:02Z")
s/n 1602h13034 is this a 2002 ``` Thanks in advance for any help ``` ---
**Author:** ![tallen](https://avatars.discourse-cdn.com/v4/letter/t/f04885/32.png) [@tallen](https://forum.nachi.org/u/tallen)\ **Post date:** [September 2, 2006, 4:20pm UTC](https://forum.nachi.org/t/lennox-age/7123/2 "2006-09-02T16:20:38Z")
**HVAC AGE CODES IN SERIAL # INFO** **Amana:** BLACKHORSE. B=1971 or 1981. (Of course, now that they’ve been bought by Goodman, who knows what’ll happen.) \*\*BARD \*\*1962 to March 1980 Sample Number 123456 A D 1st six digits are the Unit Identity Number. In this example they are represented by the numbers 123456. 7th digit is the month of Manufacture. (The letter A in the Sample represents January). A = January B = February C = March D = April E = May F = June G = July H = August Letter “I” was not used. J = September K = October L = November M = December 8th digit is the year of Manufacture. (The letter D in the Sample represents 1964). 1962 = B 1963 = C 1964 = D 1965 = E 1966 = F 1967 = G 1968 = H Letter “I” was not used. 1969 = J 1970 = K 1971 = L 1972 = M 1973 = N 1974 = O 1975 = P Letter “Q” was not used. 1976 = R 1977 = S 1978 = T 1979 = U 1980 = V \*\*Bard \*\*April & May 1980 Sample number 123 D A 123456 1st three digits are the Compressor Part Number. 4th digit is the month of Manufacture. In this sample D represents April. D = April F = May 5th digit is the year of Manufacture. In this sample A represents 1980. 1980 = A This serial number style was only used during the months of April & May 1980. 6th thru 11th digits represent the Unit Identity Number. \*\*Bard \*\*June 1980 to Current Sample number 123 H80 1234567 02 1st three digits = Compressor Part # 4th digit = Month A = January B = February C = March D = April “E” was not used F = May “G” was not used H = June “I” was not used J = July K = August L = September M = October N = November “O” was not used P = December 5th & 6th digits = Year 80 = 1980 81 = 1981 82 = 1982 right on thru. The year 2000 started the numerical numbering from 00. 00 = 2000 01 = 2001 02 = 2002 right on thru to current date. 7th thru 13th digits = Unit Identity # 14th & 15th digits = Factory Code (01=OH; 02=GA) \*\*Carrier, Bryant, Payne, Day & Night: \*\*Recently (last 20 years or so) the first four numbers in the serial number represent the week and year. Previously, it was a complex series of letters and single digits. Call 905 672-0860 if you get stuck. \*\*Coleman: \*\*Serial numbers prior to April 1992=1st two numbers are month, then year, then series. After April 1992, 1st two numbers are year, then month, then series. **Comfortmaker (International Comfort)** uses the first letter for the month (skipping I) and the first two digits are the year. **First Company Service Parts** is one of 4 divisions of First Operations. They supply OEM equipment to all of the major HVAC manufacturers. They are located in Dallas, Tx at 214-388-5751. Harold Hammer at Tech Support (ext#5) will answer your questions. **Goodman:** First two digits of the serial number are the year. Second two are the month. Btu rating is model number…ie; GMP075-3 (75,000 bonnet input) Compressor is same :serial # 9709088872 (yr1997 wk 09) Tonnage is model # CK361C The first two numbers after the CK (letters) divided by 12 is tons. ie: 36 div by 12= 3 tons. **Lennox** : Either the first two or second two digits are the year, it varies by era, but most of them actually have a separate sticker somewhere that has the year printed on it. Newer ones are first two equals manufacturing plant #, 2nd two are year and letter in fifth slot is month (A thru M minus I). So 5898G 07568 would be Plant # 58, Year of MFR would be 98 and month would be July. **Rheem & Rudd** : in the middle of the serial number will be a letter “F” the following four numbers are the week and year. The first letter of the serial number gives the year of manufacture as follows: **TRANE** Trane uses alpha codes in their serial numbers to determine year of manufacture. They started this in 1987 with the letter B and skipped a couple of letters during the years… The first letter of the serial number gives the year of manufacture as follows: In 2002 they started their serial numbers with the year it was built. In 2002 the first character of the serial number is 2, in 2003, 3 and so on. Z=2001 R=2000 P=1999 N=1998 M=97 L=96 K=95 J=94 H=93 G=92 F=91 E=90 D=89 C=88 B=87 S=86 Y=85 X=84 W=83 U=82(seventh digit) T=81(seventh digit) O, A=80(seventh digit) **YORK** ( **Unitary Products since 1984** ) Note: they skip the letters I, O, Q, U, Z. Year of make indicated by 3rd letter in the serial number. **Fraser, Johnston and Luxaire** were purchased by York in 1980. ## 1971 - A 1972 - B 1973 - C 1974 - D 1975 - E 1976 - F 1977 - G 1978 - H 1979 - J 1980 - K 1981 - L 1982 – M 1983 – N 1984 – P 1985 - R 1986 - S 1987 - T 1988 - V 1989 - W 1990 - X 1991 – Y 1992 – A 1993 - B 1994 - C 1995 – D 1996 - E 1997 - F 1998 - G 1999 - H 2000 - J 2001 - K 2002 - L 2003 - M 2004 - N 2005 - P 2006 - R 2007 - S David Valley MAB Member _“Happiness is good health and a bad memory.”_ **[MassCertified.com](http://www.masscertifiedhomeinspections.com/)** **[HomeInspectionMassachusetts.com](http://www.homeinspectionmassachusetts.com/)** [RIGHT][RIGHT][file:///C:/DOCUME%7E1/Todd/LOCALS%7E1/Temp/msoclip1/01/clip\_image001.gif](http://www.nachi.org/forum/newreply.php?do=newreply&p=1101)[/RIGHT][/RIGHT]