About A.O. Smith
The company was founded in 1874 in Milwaukee, Wisconsin, where today the Company is headquartered. A. O. Smith employs over 12,000 individuals at operations in the United States, Canada, Mexico, China, India, the United Kingdom and the Netherlands. We also have sales and distribution in more than 60 countries around the world.
Click to scroll to A.O. Smith contact informationHVAC Age / Serial Decoder
Style 1
The first two numbers represent the year the heater was built. If your heater was built before 2008, the next two numbers represent the month. If your heater was built after 2008, the next two numbers represent the week.
Variant A
2 | 2 | 1 | 3 | A | 1 | 2 | 3 | 4 | 5 | 6 |
Year is Green, Week is Blue.
Variant B
S | 2 | 2 | 1 | 3 | F | 1 | 2 | 3 | 4 | 5 | 6 |
Year is Green, Week is Blue.
Variant C
2 | 2 | 1 | 3 | 1 | 2 | 8 | 9 | 1 | 4 | 1 | 7 | 7 |
Year is Green, Week is Blue.
Style 2
Ignoring the first letter, the second letter represents the month, and the first two digits represent the year. The difference between Variant A and Variant B is the introduction of hyphens and overall length in Variant B.
Variant A
M | B | 0 | 3 | A | 1 | 2 | 3 | 4 | 5 | 6 |
Year is Green, Month is Yellow.
Variant B
M | B | 0 | 3 | - | 1 | 2 | 3 | 4 | 5 | 6 | 7 | - | S | 1 | 2 |
Year is Green, Week is Yellow.
How to translate Character to Month
A | January |
B | February |
C | March |
D | April |
E | May |
F | June |
G | July |
H | August |
J | September |
K | October |
L | November |
M | December |
Style 3
The first letter represents the month, and the first two digits represent the year. The difference between Variant A and Variant B is the introduction of hyphens and overall length in Variant B.
Variant A
A | 0 | 3 | A | 1 | 2 | 3 | 4 | 5 | 6 |
Year is Green, Month is Yellow.
How to translate Character to Month
A | January |
B | February |
C | March |
D | April |
E | May |
F | June |
G | July |
H | August |
J | September |
K | October |
L | November |
M | December |
Contact Information for A.O. Smith
Email Addresses
Tech Support and Warranties
help@hotwater.comReplacement Parts
contactus@hotwater.comWebsites
Addresses
A. O. Smith Corporate Headquarters11270 West Park Place, Suite 170
P. O. Box 245008
Milwaukee, Wisconsin 53224
USA