How old is my American Water Heater unit?
American Water Heater is part of A.O. Smith Corp. 6 serial formats sourced across water heater, tankless water heater.
Serial number decoder for American Water Heater
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 1210A002243
- American Water Heater water heater serial numbers in the 2008 to present format encode the year as digits 1-2 (YY) after optional leading S and the week as digits 3-4 (source: building-center.org).
- Example: serial 1210A002243 decodes to week 10 of 2012.
- American Water Heater water heater serial numbers in the 2008 to present format encode the year as digits 1-2 (YY, 20YY) after any leading letter and the week as digits 3-4 (source: building-center.org).
- Example: serial 1924115263020 decodes to week 24 of 2019.
- American Water Heater water heater serial numbers in the before 2007 format encode the year as digits 1-2 (YY) and the month as digits 3-4 (building-center American style 1; GSW/John Wood FAQ: month before 2008) (source: building-center.org).
- Example: serial 05035 35368 decodes to March 2005.
- American Water Heater's official lookup at americanwaterheater.com returns warranty status.
Decoder pages by product
Format eras
- before 2010 VERIFIED
A##A######Water Heater - 2008 to present VERIFIED
####A######Water Heater, Heat Pump Water Heater, Tankless Water Heater - 2008 to present VERIFIED
#############Water Heater - before 2008 VERIFIED
AA##A######Water Heater - before 2007 VERIFIED
##### #####Water Heater - 1970 to 1979 VERIFIED
A##-A-##-######Water Heater
Official lookup: the authority
Open the official American Water Heater lookup takes serial; returns warranty status; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- Johnson City, TN on the plate. Distributed under dozens of brands (Whirlpool, U.S. Craftmaster, Craftmaster, Lowes, Proline, Premier, Polaris, Champion...). Current style = A.O. Smith YYWW.
Sources
- https://www.building-center.org/a-o-smith/
- https://www.building-center.org/american-water-heater-age/
- https://www.building-center.org/whirlpool-water-heater-age/
- https://www.building-center.org/u-s-craftmaster-water-heater-age/
- https://www.building-center.org/craftmaster-water-heater-age/
- https://johnwoodwaterheaters.com/faqs/official
- https://gsw-wh.com/faq/official
- https://www.americanwaterheater.com/support/warranty-verification.htmlofficial