Unitary Products A/C Age

Specific Inspection Topics Inspecting HVAC Systems
1

Please identify age Unitary Products ( York- Borg Warner ) Air conditioner

There is a shut off breaker on the outside so I think the unit is relatively new.
Mod. H12D024S06A
Ser. WOD7676459

Thanks Bruce

2

Third letter of the Serial number “D” indicates either 1974 or 1995. Since you think it’s “newer” I’d go with the 1995 option.

3

It’s from 1976. It even says it twice! Or was that New York, New York? Ah, I’m so confused. At least there’s more golf today at Torrey Pines. :margarit:

I’ll go with Mark.

4

Actually, that looks like it might have been made in 2007 at the York-UPG Witchita plant.

York and Unitary Products Group (UPG, which is a division of York) actually had different serial number coding. That 10 character serial number coding looks like a strange one used by UPG more recently, which has:
Letter … Plant
Number … Year - First Digit
Letter … Month
Number … Year - Second Digit
xxxxxx … 6-Digit Sequence Number

But (there is always a “but”), my understanding is that coding (along with the older York coding, where the third character indicated the year) was only used up to 2005. So I would call UPG to be sure.

5

Thanks Robert, makes sense, house was built in 1989, and the outside breaker suggests a recent A/C

6

OK, what happens when the 2nd “Number” is a letter?

Model Number: AC036X1021A
Serial Number: WDLM003435

I would guess 2000 but it doesn’t follow the same scheme. Any guesses?

7

York and Unitary serial numbers that have four letters followed by six digits use the third letter as the year. The L is 1981 or 2002.

8

Thanks!

9

UPG Serial Number (S)EBHM062202

Any idea what year this is?

10

What is it on?