American Water Heater Water Heater Warranty Guide
Manufactured by A.O. Smith Corporation · Warranty info last verified: March 2026
American Water Heater water heaters are manufactured by A.O. Smith Corporation. This guide covers 3 product lines: the ProMax / Standard, ProMax Plus / Mid-Tier, and ProMax SELECT / Premium. Across those lines, tank or heat exchanger coverage climbs from 6 years on the ProMax / Standard to 12 years on the ProMax SELECT / Premium, parts reach 12 years, and labor runs up to 1 year. The warranty stays with the original owner and does not transfer to later owners, and claims run through 800-456-9805.
Quick Warranty Facts
Tank / H.E. Coverage
6–12 years
Parts Coverage
12 years max
Labor Coverage
1 year
Transferable
No
Extended Warranty
N/A
Registration Required
Recommended
Warranty by Product Line
Coverage periods vary by model series. Check your model against the table below.
| Product Line | Tank / H.E. | Parts | Labor |
|---|---|---|---|
ProMax / Standard Entry-level residential line sold through wholesale distribution. | 6 yr | 6 yr | 1 yr |
ProMax Plus / Mid-Tier Mid-tier line with improved efficiency. | 9 yr | 9 yr | 1 yr |
ProMax SELECT / Premium Premium residential line with extended coverage. | 12 yr | 12 yr | 1 yr |
How to Register Your American Water Heater Water Heater
There is no strict registration deadline listed for American Water Heater, yet filing it is smart insurance for the 3 lines shown here. Registration puts your purchase date and installer on record so a later claim through 800-456-9805 moves faster.
You will need:
- Serial number (from the rating label)
- Model number
- Installation date
- Installer's name and contact info
- Your name and address
Keep a copy with your American Water Heater paperwork in case you later call 800-456-9805.
What's Covered
- Defects in materials and workmanship under normal residential use
- ProMax / Standard: 6-year tank coverage, 6-year parts, and 1-year labor
- ProMax Plus / Mid-Tier: 9-year tank coverage, 9-year parts, and 1-year labor
- ProMax SELECT / Premium: 12-year tank coverage, 12-year parts, and 1-year labor
What's NOT Covered
American Water Heater lists 4 situations that fall outside coverage on its 3 lines:
- Improper installation
- Sediment and scale damage
- Labor after year one
- Units not installed by a licensed professional
How to File a American Water Heater Warranty Claim
- 1
Locate serial and model numbers on the rating label
- 2
Call American Water Heater at 800-456-9805
- 3
A service technician will be dispatched for diagnosis
- 4
Warranty parts are provided at no charge
American Water Heater warranty line: 800-456-9805
Warranty Transferability: No
Warranty is for the original purchaser only and does not transfer.
Bought a home that came with a American Water Heater unit? Because American Water Heater coverage stays with the first owner, the remaining warranty probably did not follow the sale to you, even if the calendar time has not expired. To confirm, decode the serial with our free tool for the manufacture date, then call the American Water Heater line at 800-456-9805 (labor help is limited to 1 year from install).
Additional Notes
American Water Heater Company is an A.O. Smith subsidiary and also manufactures Craftmaster and Envirotemp branded water heaters. Products are distributed through professional wholesale channels.
Related brands with similar warranty terms:
American Water Heater Warranty FAQ
How many years does the American Water Heater tank warranty last?
American Water Heater tank or heat exchanger coverage ranges from 6 to 12 years, from the ProMax / Standard up to the ProMax SELECT / Premium. Parts are covered for up to 12 years and labor for up to 1 year.
Can I transfer a American Water Heater water heater warranty to a new owner?
No. American Water Heater warranties are not transferable. Warranty is for the original purchaser only and does not transfer.
How do I check whether my American Water Heater water heater is still under warranty?
Decode your serial number with our free tool at WaterHeaterChecker.com to find the manufacture date, then compare it against the coverage for your line (ProMax / Standard, ProMax Plus / Mid-Tier, and ProMax SELECT / Premium). You can also call American Water Heater at 800-456-9805 with your serial number.
What voids a American Water Heater water heater warranty?
Common warranty voiding issues for American Water Heater include: Improper installation; Sediment and scale damage; Labor after year one.
Does American Water Heater sell an extended warranty for the ProMax / Standard, ProMax Plus / Mid-Tier, and ProMax SELECT / Premium?
The ProMax / Standard, ProMax Plus / Mid-Tier, and ProMax SELECT / Premium carry only the standard American Water Heater factory warranty shown above; no separate extended plan is listed. Ask about dealer coverage when you call 800-456-9805.
What should I do if my American Water Heater water heater fails under warranty?
Locate serial and model numbers on the rating label. Then call American Water Heater at 800-456-9805. The American Water Heater warranty line is 800-456-9805.
More for Your American Water Heater Water Heater
Not sure which of American Water Heater's 3 lines you have?
Coverage differs across American Water Heater's lines, so decode your serial number to find the manufacture date and match it to the right 3-line warranty range above.
Decode Your American Water Heater Serial NumberThe 3 coverage figures shown above were last verified in March 2026 and are provided as a helpful reference only. Warranty terms are set by American Water Heater and may change at any time. Always refer to the warranty certificate that came with your water heater for the definitive terms of your coverage. WaterHeaterChecker.com is not affiliated with American Water Heater or A.O. Smith Corporation.