York A/C & Furnace Serial No Decoding Help

Specific Inspection Topics Inspecting HVAC Systems
1

I don’t run into these very often and need help decoding the age from the S/N. Unitary Products Group is the manufacture. In this case it had the York name on it. I’m making an assumtion that GM has something do to with the year. Just don’t know the sequence.

A/C Unit: Model H2DB024S06B Serial: (S) EGGM255175
Furnace: Model: P3URB10N05501B Serial: EFGM186034

Thanks in advance for your help!

2

1981 for both.

Is that consistant with the age of the house?

3

Not even close! The home was built in 1913. It always makes it more of a challenge when it’s a replacement furnace :cool:. And that makes it interesting how HVAC contactors in the past felt is was perfectly fine to notch any joist or girder as they saw fit to get that register installed without tearing the asbestos wrap!

4

I would have thought it was 10 to 15 years old not 20+ years. It’s a two pipe heat exchanger 90% eff. Maybe 1991

420RuuglesSt 046.jpg

420RuuglesSt 039.jpg

5

EFG & EGG S/N looks like 1998 to me

6

1977 or 1998 from my reference

7

file:///C:/Users/ETHI/AppData/Local/Temp/moz-screenshot-1.jpg

8

Serialnumberforyork.pdf (174 KB) here you go

9

I think Wayne has it.

I read the wrong side of my chart for the letter G :oops:

1977 or 1998 (dag nabbit, read it wrong again)

My chart says '77 or '98

10

What was the ANSI year?

11

YORK** (1971 to October 2004)
Date of Manufacture (1971 – October 2004): The manufacturing date code is the second and third digits of the serial number, written as Month and Year of manufacture. (To determine month: A = Jan; B = Feb; C = Mar; D = Apr; E = May; F = Jun; G = Jul; H = Aug; I was not used; J was not used; K = Sep; L = Oct; M = Nov; and N = Dec.).

To determine year of manufacture:

  • 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

Sample Serial Numbers: The year is indicated in Red and the month in Blue.

  • EFBM210830 -This sample serial number indicates that the unit was manufactured in June of either 1972 or 1993.
  • EEHM611744 – This sample serial number indicates that the unit was manufactured in May of either 1978 or 1999.

YORK** (October 2004 to Present)
Date of Manufacture (October 2004 to Present): The manufacturing date code is the second and third and fourth digits of the serial number. (To determine month: A = Jan; B = Feb; C = Mar; D = Apr; E = May; F = Jun; G = Jul; H = Aug; I was not used; J was not used; K = Sep; L = Oct; M = Nov; and N = Dec.).

To determine the year of manufacture combine the 2nd and 4th digits of the serial number.
Year
2nd Digit
4th Digit
2004
0
4
2005
0
5
2006
0
6
2007
0
7
2008
0
8
2009
0
9
2010
1
0
2011
1
1
2012
1
2

Sample Serial Numbers: The year is indicated in Red and the month in Blue.

  • N0L4123456 -This sample serial number indicates that the unit was manufactured in October, 2004.
  • W0A9123456 – This sample serial number indicates that the unit was manufactured in January, 2009.
12

Could not see due to interference. And those lables are horrible to read! 1998 would be most correct as far as everything else with the system that I saw today.
Thanks!!

13

Thanks! That was a very good reference! My references didn’t include this mfg, but it will now. :o