How old is my State unit?

State is part of A.O. Smith Corp. 6 serial formats sourced across water heater, tankless water heater.

• State 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.
• State water heater serial numbers in the before 2010 format encode the year as digits 2-3 (YY); century from ANSI date on plate and the month as letter 1 (A=Jan..M=Dec, I skipped) (source: building-center.org).
• Example: serial H765662231 decodes to August 1976.
• State water heater serial numbers in the before 2004 format encode the year as digits 3-4 (YY) and the month as letter 2 (A=Jan..M=Dec, I skipped) (source: building-center.org).
• Example: serial AF04A093001 decodes to June 2004.
• State's official lookup at statewaterheaters.com returns warranty status.

Decoder pages by product

Format eras

• before 2010 VERIFIED
  A#########Water Heater
• before 2010 VERIFIED
  A##A######Water Heater
• 2008 to present VERIFIED
  ####A######Water Heater, Heat Pump Water Heater, Tankless Water Heater
• before 2008 VERIFIED
  AA##A######Water Heater
• before 2004 VERIFIED
  AA##A######Water Heater
• 1970 to 1979 VERIFIED
  A##-A-##-######Water Heater

What we could not confirm

• State is treated as sharing A.O. Smith's format because the source lists it in that family; the corporate relationship itself is an estimate.
• Current State serials (1210A002243 / S1318 F000046 / 1836111786352) are the A.O. Smith YYWW style. Two discontinued State-specific styles below. Warranty page is the AO Smith verification tool re-skinned (serial or reference number).

Sources

• https://www.building-center.org/a-o-smith/
• https://www.building-center.org/state-water-heater-age/
• https://www.statewaterheaters.com/support/warranty-verification.htmlofficial

State water heater State tankless water heater A.O. Smith family Guides