How many years is an A. O. Smith water heater warranty?

The warranty length for an A. O. Smith water heater varies by product line, as A. O. Smith uses warranty duration to differentiate its tiers. For residential tank water heaters, the most common warranties are 6-year, 9-year, and 12-year limited warranties on the tank and parts. The entry-level Signature and ProLine models sold at Lowes often come with 6-year tank and parts warranties. Mid-range models come with 9-year warranties, and premium ProLine Master and Signature Premier models come with 10-year or 12-year warranties that include longer coverage on the tank and parts. Some commercial and specialty models like the Voltex hybrid heat pump water heater have 10-year tank and 10-year parts warranties, with 1-year labor. The Conservationist and other point-of-use models may have 6-year warranties. For A. O. Smith tankless gas water heaters, residential warranties are typically 12 to 15 years on the heat exchanger, 5 years on parts, and 1 year on labor, with commercial tankless warranties shorter at 5 years on the heat exchanger. The warranty requires professional installation by a licensed contractor, product registration within a specified time, and proper maintenance. Labor coverage is generally only one year unless extended. Always check the warranty card included with your specific model number for exact coverage, as terms and exclusions vary by series and fuel type.