American Standard furnace and AC age by serial number
American Standard furnaces, air conditioners and heat pumps put the year and week of manufacture near the start of the serial. The layout depends on when the unit was built, so this American Standard serial number lookup checks every style for the American Standard manufacture date.
Where do I find the serial number?
The data plate on an American Standard furnace sits inside the cabinet, visible once the blower door is removed. On the outdoor condenser or heat pump, check the side panels and the corner where the electrical disconnect connects.
How to read a American Standard serial number
Read an American Standard serial according to its first character. Two leading digits mean the 2010 style: year, then week. A single digit followed by the week means 2002 to 2009. A leading letter means 1983 to 2001, with the letter standing for the year.
Two-digit year, week
- Used
- 2010 to present
- Format
- Two-digit year, week
- Example
- 11241KADBB
Example, read
One-digit year, week
- Used
- 2002 to 2009
- Format
- One-digit year, week
- Example
- 81422S41G
Example, read
Year letter, week
- Used
- 1983 to 2001
- Format
- Year letter, week
- Example
- R1742DWBF
- Years
- W 1983, X 1984, Y 1985, S 1986, B 1987, C 1988, D 1989, E 1990, F 1991, G 1992, H 1993, J 1994, K 1995, L 1996, M 1997, N 1998, P 1999, R 2000, Z 2001.
Example, read
The year letters are not in alphabetical order, so read them from the table, not by counting.
Where to find the serial number
The data plate on an American Standard furnace sits inside the cabinet, visible once the blower door is removed. On the outdoor condenser or heat pump, check the side panels and the corner where the electrical disconnect connects.
Brands with the same format
Trane uses the same serial format as American Standard.
Questions
How old is my American Standard furnace or AC?
Type the serial into the decoder above. It works out whether the serial uses a two-digit year, a one-digit year or a year letter, and reads the week that follows.
What does 7165RHAIG mean?
The 7 is the year and 16 is the week, so it was made in week 16 of 2007.
Does American Standard use the same serial format as Trane?
Yes. American Standard and Trane serials follow the same three styles, so the decoder treats them the same way.
Could a single-digit year mean 1997 instead of 2007?
Not with this style. The one-digit year format was used from 2002 to 2009, so 7 can only mean 2007. Units from the 1990s used a year letter instead.
What if my American Standard is older than 1983?
Formats from before 1983 are not in our rules yet. A manufacture date may be printed separately on the plate.
Can I look up a American Standard model number here?
Not on this site. An American Standard model number names the product series and size, and only the serial carries the manufacture date.