Carrier serial number

[kcb203]

What year was this Carrier furnace built?

Model: 58GC100
Serial: K256293

Based on Carrier's website I think it means 1972, but I don't think it could be that old, could it?

[chillbilly]

I would think it's a 1993

[tlcartman]

not 1993

[BaldLoonie]

Don't recall a 58GC in the last 20+ years. Certainly not from the 90s. Could be 70 something...

[chillbilly]

Sorry, don't know.

[Dad]

just a guess... november 25 1976 or 86?

[hvac r us 2]

Originally posted by BaldLoonie
Don't recall a 58GC in the last 20+ years. Certainly not from the 90s. Could be 70 something...

Me either, let me look when I get in the office on Monday.

[dash]

K is the month,2 is the year.Not 1992 because the "code" was changed before that ,82 or more likely 72.

[berad]

I think they are those robbin egg blue beasts with the two wire bimetal flame prover. The long, flat, wide ribbon burners and the funny burner strap that liked to rott through.

[t1tech]

preston's guide shows the units to be in the 70's
various dash numbers and or dash num with a letter after the 100,that may get you closer

[HVAC Pro]

I won't ponder a guess, but why do manufacturers want to keep it such a secret what year equipment was built? I like the way Trane, Rheem and some Carrier models print clearly the month and year of manufacture on the info plate.

[jrbenny]

Originally posted by kcb203
What year was this Carrier furnace built?

Model: 58GC100
Serial: K256293

Based on Carrier's website I think it means 1972, but I don't think it could be that old, could it?

November 1972.

[bartdude]

Carrier serial #'s:

7 digits = pre 1969
1 Letter (A-L (Jan-Dec)) + 6 digits (first being the year) = 1970-1979
1 Letter (M-Z) + 6 digits = first part of the 1980's.

After about 1985, the serial numbers are much easier

[kcb203]

Thanks for the info. I found the formula on Carrier's website but was surprised the unit could be that old. An addition was added to my house in 1984, taking it from 1800 square feet (including conditioned basement) to 2500 square feet. I figured that the furnace would have been replaced then, as the A/C was.

The A/C build date tells an amusing story. The addition was built in the fall of 1984, and the A/C was manufactured in June 1985. Clearly, the owner at the time didn't want to upgrade either the furnace or the A/C when the addition was built, but once summer hit in 1985, the A/C was replaced. There must have been some miserable days before that was swapped.

[HVAC Pro]

After about 1985, the serial numbers are much easier [/QUOTE]

Morse code is much easier than trying to read most of these serial numbers.