This guide explains how to read A. O. Smith serial numbers, identifies common date-code patterns, and provides actionable steps to confirm a unit’s manufacture date.

That starts with 20. The device was produced in 2020. The next two digits are 37. So that is week 37. That means it was produced between September 7 and 13, 2020. Discover our complete …

Enter your A.O. Smith water heater serial number and model number to instantly discover manufacturing date, current age, and detailed specifications. Essential for warranty claims, …

Aug 11, 2025 · Learn how to determine your A.O. Smith water heater’s age by decoding the serial number. Find manufacturing dates, lifespan tips, and when to consider replacement.

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 …

Sep 25, 2025 · You can determine the age of your AO Smith water heater by decoding its serial number, located on the rating plate near the top or side of the tank. For units made before …

We give contact information for AO Smith water heater, geyser, cylinder, calorifier manufacturers and for water heater installation, operation, & troubleshooting manuals. We include a table of …

Nov 12, 2023 · In this guide, we’ll show you how to determine the age of your water heater, including specific instructions for popular brands like Rheem, A.O. Smith, American, Bradford …

Dec 10, 2025 · By reviewing the variations below, you can match your serial number style to the correct decoding method and accurately determine your A.O. Smith water heater’s age.

Learn how to easily determine your ao smith water heater age using the serial number decoder and manufacturing date format. Get accurate results in minutes with my step-by-step guide