Age please

Carrier furnace 58GS125, ser.# C589A10526 and Carrier a/c 38TK042300 ser.# 0789E28910 thanks.

looks like 1989

I concur…1989

Thanks.

I’m not coming up with 1989 for either of those.

On the first one, I’m coming up with March 1975.

On the second one, I’m coming up with February 1987.

Here is what I have collected on Carrier…

CARRIER™

HISTORY: A wholly owned subsidiary of UNITED TECHNOLOGIES

Product Type
Sample Serial /Model #’s
Decoding
Commercial Chiller
SN: 3591F71392

Model # Example (30GT-225-600AJ) 225 Ton Unit
From 1980 to Present the first two digits of the serial number indicate the week and the 3rd and 4th digits indicate year of manufacture. In the sample # the Commercial Chiller was manufactured the 35th week of 1991.

Commercial Boiler

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Commercial Furnace

Residential AC (1980 to present)

Manufactured by CARRIER Corp., Syracuse
SN: 1389E54894

Model # Example
38AH0245 – 9,2 Cooling Capacity; 222,000 BTUs per hour
From 1980 to Present the first two digits of the serial number indicate the week and the 3rd and 4th digits indicate year of manufacture. In the sample # the unit was manufactured the 13th week of 1989

Residential Boiler (1980 to present)

Manufactured by DUNKIRK
SN: 3601****V04044S

Model # Example
BS1AAN000075ABAA
The date of manufacture is found by using the first four digits of the serial #. The 1st and 2nd digits represent week of manufacture and the 3rd and 4th digits represent the year of manufacture. In the sample # the boiler was manufactured the 36th week of 2001.

Residential Furnace (Prior to 1970)
SN: 2xxxxxxx
Through the 1960’s Carrier used the first digit of the serial number to indicate year of manufacture. For example: 2xxxxxxx = 1962, 3xxxxxxx = 1963, etc.

Residential Furnace (1970 thru 1979)
SN: M4xxxxxx (1970 through 1979)
Beginning in 1970 Carrier used the first two digits of the serial number with the 1st digit (Letter) indicating the month of manufacture. A=January, B=February, C=March, D=April, E=May, F=June, G=July, H=August, “I” was not used, J=September, K=October, L=November, and M=December. The 2nd digit (Number) indicated the year. 0=1970, 1=1971, 2=1972, 3=1973, 4=1974, 5=1975, 6=1976, 7=1977, 8=1978, 9=1979. In the sample provided the furnace was manufactured December 1974.

Residential Furnace (1980 to present)
SN: 3784****C47010 (1980 to Present)

Model # Example
48GP02404030
From 1980 to Present the first two digits of the serial number indicate the week and the 3rd and 4th digits indicate year of manufacture. In the sample # the Furnace was manufactured the 37th week of 1984

There’s a significant typo there. The “1979” should be “1989” which would appear to be overlapping with your “Residential Furance (1980 to present),” and, indeed, there was overlapping going on. That’s why it’s important to look at the type of serial number it is and match it to the correct period.

Such overlapping usually resulted from several causes, of which two major causes were:

1 - Different manufacturing plants had different protocols
2 - Various strikes resulted in outsourcing to other plants, and sometimes to other manufacturers.

Additionally, the letters A through M (excepting I) were used in the 1970s to indicate the month. In the 1980s, the months were indicated with the letters N through Z. Unfortunately, some plants used the letter O and some did not, so one can find certain plants using N-Z (excepting O) and some plants using N-Y (including O) (the 1980s were not a good time for Carrier). So if one were to find a Z8, it would be December 1988. However, if one found a Y8, it could be either November or December 1988, depending on where it was manufactured.

Thanks, Russel.

If you don’t mind - I will incorporate the information you provided.

Carrier furnace 58GS125, ser.# C589A10526 and Carrier a/c 38TK042300 ser.# 0789E28910 thanks.

My thought is that the “C” in this serial number is actually a “0”, and was made in 1989 because the A/C unit by that serial number would have been made in 1989.

At least in this area, the A/C unit is past it’s average life of 12 years or so! :wink:

Because the 1980s were a time when I had several fingers in real estate in several states, I think the C is a C, but I believe in the next serial number, the zero is actually the letter O.

Thank you all for the info.I will print this out for future reference.