# Furnace Age Help Please **URL:** \ **Category:** Inspecting HVAC Systems\ **Created:** [March 9, 2006, 9:25pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276 "2006-03-09T21:25:33Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![tneumann](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/tneumann/32/184_2.png) [@tneumann](https://forum.nachi.org/u/tneumann)\ **Post date:** [March 9, 2006, 9:25pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/1 "2006-03-09T21:25:33Z")
Please help me date this furnace…thanks! Carrier M # 349FAD060140 S# 2386V00518 Thanks in advance. T ---
**Author:** ![apolillo](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/apolillo/32/906_2.png) [@apolillo](https://forum.nachi.org/u/apolillo)\ **Post date:** [March 9, 2006, 9:28pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/2 "2006-03-09T21:28:56Z")
[quote=tneumann] Please help me date this furnace…thanks! Carrier M # 349FAD060140 S# 2386V00518 Look like 1986. Anatol ---
**Author:** ![JLilly](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jlilly/32/950_2.png) [@JLilly](https://forum.nachi.org/u/JLilly)\ **Post date:** [March 9, 2006, 11:06pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/3 "2006-03-09T23:06:55Z")
I concur 1986. ---
**Author:** ![tneumann](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/tneumann/32/184_2.png) [@tneumann](https://forum.nachi.org/u/tneumann)\ **Post date:** [March 9, 2006, 11:09pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/4 "2006-03-09T23:09:12Z")
Thank you gentlemen…What is the 23 prior to that? I cannot seem to find any help online…that water heater date code help is wonderful…wish I could find one for furnaces… Maybe I should buy a guide? ---
**Author:** ![ecox1](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/ecox1/32/1936_2.png) [@ecox1](https://forum.nachi.org/u/ecox1)\ **Post date:** [March 9, 2006, 11:19pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/5 "2006-03-09T23:19:35Z")
23 week ---
**Author:** ![aslimack](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@aslimack](https://forum.nachi.org/u/aslimack)\ **Post date:** [March 9, 2006, 11:20pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/6 "2006-03-09T23:20:12Z")
Month / day Adam, A Plus ---
**Author:** ![tallen](https://avatars.discourse-cdn.com/v4/letter/t/f04885/32.png) [@tallen](https://forum.nachi.org/u/tallen)\ **Post date:** [March 9, 2006, 11:21pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/7 "2006-03-09T23:21:54Z")
Courtesy of David Valley 😃 **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 ---
**Author:** ![tneumann](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/tneumann/32/184_2.png) [@tneumann](https://forum.nachi.org/u/tneumann)\ **Post date:** [March 9, 2006, 11:24pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/8 "2006-03-09T23:24:22Z")
Wow! ---
**Author:** ![tallen](https://avatars.discourse-cdn.com/v4/letter/t/f04885/32.png) [@tallen](https://forum.nachi.org/u/tallen)\ **Post date:** [March 9, 2006, 11:36pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/9 "2006-03-09T23:36:01Z")
> [@tneumann](#): > > Wow! So many secrets in the archives.😉 Now, copy and paste all this stuff into your computer!!! ---
**Author:** ![tneumann](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/tneumann/32/184_2.png) [@tneumann](https://forum.nachi.org/u/tneumann)\ **Post date:** [March 9, 2006, 11:37pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/10 "2006-03-09T23:37:29Z")
I am I am…I usually search first but I was on a roll showing my newbiness…thought I’d keep going… ---
**Author:** ![aslimack](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@aslimack](https://forum.nachi.org/u/aslimack)\ **Post date:** [March 9, 2006, 11:40pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/11 "2006-03-09T23:40:00Z")
Newbiness? Rut-roh Adam, A Plus ---
**Author:** ![jclark1](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jclark1/32/1023_2.png) [@jclark1](https://forum.nachi.org/u/jclark1)\ **Post date:** [March 9, 2006, 11:51pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/12 "2006-03-09T23:51:52Z")
Damn, I just forked out 80 bucks for a technical guide from Carson-Dunlop. ---
**Author:** ![tneumann](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/tneumann/32/184_2.png) [@tneumann](https://forum.nachi.org/u/tneumann)\ **Post date:** [March 9, 2006, 11:53pm UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/13 "2006-03-09T23:53:41Z")
LOL…mine cost me $289…but I got so much more! ---
**Author:** ![jsmith3](https://avatars.discourse-cdn.com/v4/letter/j/d26b3c/32.png) [@jsmith3](https://forum.nachi.org/u/jsmith3)\ **Post date:** [March 10, 2006, 2:01am UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/14 "2006-03-10T02:01:25Z")
Thanks alot Todd and David. I was going to post a request for a date on a Lennox and came across your list. It’s a great help!! Jon Smith ---
**Author:** ![msaxton](https://avatars.discourse-cdn.com/v4/letter/m/46a35a/32.png) [@msaxton](https://forum.nachi.org/u/msaxton)\ **Post date:** [March 10, 2006, 4:49am UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/15 "2006-03-10T04:49:05Z")
copied,pasted,saved,and printed out so it goes in my organizer that goes with me, Thanks Todd ---
**Author:** ![slemarr](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/slemarr/32/183363_2.png) [@slemarr](https://forum.nachi.org/u/slemarr)\ **Post date:** [February 12, 2009, 1:33am UTC](https://forum.nachi.org/t/furnace-age-help-please/2276/16 "2009-02-12T01:33:02Z")
For furnace age and water heater age See: [http://www.inspect-ny.com/plumbing/Furnace\_Water\_Heater\_Age\_Charts.pdf](http://www.inspect-ny.com/plumbing/Furnace_Water_Heater_Age_Charts.pdf) Yes I stole some of the info from this forum some time ago, and thanks whoever contributed it but have taken the info several steps further. Most of the info was verified by the manufactures although I was suprised what most did not know… Hope it works for you and let me know of addtions and/or corrections.