A. O. Smith warranty for water heaters
The short version
A. O. Smith covers water heaters in full for 1 year, then keeps tank and component parts covered to 6 years. That full coverage is longer than most of the 11 brands we compared, which typically cover nothing in full. You don't need to register to get this coverage.
From A. O. Smith's published warranty, checked October 2026.
What's covered
Full coverage: everything, parts and laborPartial coverage: some parts only, you usually pay labor
Purchase5 yrs10 yrs+Full: 1 yearPartial: to 6 years
- Full coverageLabor1 year
- Partial coverageTank6 years
- Partial coverageComponent parts6 years
The fine print, decoded
What it leaves out
- Leaks
- Water damage
Good to know before you buy
- Covers the original owner only.
- Keep both your receipt and proof of the installation date; both are required.
- Coverage drops to 1 year if the heater isn't used in a single-family home.
- Trying to repair a tank leak yourself voids the warranty.
How other brands compare for water heaters
- 1. Rinnai85/100 · Full: 5 years
- 2. Navien41/100 · Full: 1 year
- 3. EcoSmart40/100 · Full: None
- 4. Bosch35/100 · Full: None
- 6. Rheem30/100 · Full: None
Where you buy it matters
How long stores give you to return it
Longest return window first, for water heaters.
- SupplyHouseMost items365 days
- Blain's Farm & FleetUpper Midwest storesMost items90 days
- AJ MadisonMost items30 days from delivery
- Do it BestMost items30 days
- FergusonMost items30 days
- Lowe'sWater heaters and HVAC systems30 days
Show all 8 stores
- SutherlandsSouth Central storesMost items30 days
- The Home DepotAir conditioners, dehumidifiers, pumps, portable evaporative coolers and portable heaters7 days
From each store's published return policy, using its rule for water heaters where it has one. Member and holiday extensions aren't counted. Check yours before you buy.
Other things A. O. Smith makes
Everything A. O. Smith makesWork at A. O. Smith and see something out of date? Send us the current terms and we'll check and update this page.Suggest a correction
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