State Water Heater Warranty Guide
Manufactured by A.O. Smith Corporation · Warranty info last verified: March 2026
Quick Warranty Facts
Tank / H.E. Coverage
6–10 years
Parts Coverage
10 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 |
|---|---|---|---|
ProLine Standard residential line. | 6 yr | 6 yr | 1 yr |
ProLine XE High-efficiency mid-tier line. | 9 yr | 9 yr | 1 yr |
ProLine Master Premium residential line with longer coverage. | 10 yr | 10 yr | 1 yr |
Vertex Power Direct Vent High-efficiency direct vent model with up to 96% thermal efficiency. | 10 yr | 10 yr | 1 yr |
How to Register Your State Water Heater
Product registration is strongly recommended, even if not strictly required. It ensures State has your information on file for warranty service and safety notifications.
You will need:
- Serial number (from the rating label)
- Model number
- Installation date
- Installer's name and contact info
- Your name and address
What's Covered
- Defects in materials and workmanship
- Tank leaks from manufacturing defects (during tank warranty period)
- Internal component failures under normal use
- Heat exchanger failure (for tankless units)
- Manufacturer's defects discovered during warranty period
What's NOT Covered
- Improper installation
- Scale and sediment damage
- Commercial use of residential units
- Labor after year one
- Unauthorized modifications
How to File a State Warranty Claim
- 1
Register your product at statewaterheaters.com
- 2
Locate serial and model numbers on the rating label
- 3
Call State customer service at 800-365-0024
- 4
A State-authorized service provider will diagnose and repair
- 5
Warranty parts are provided at no charge during warranty period
State warranty line: 800-365-0024
Warranty Transferability: No
Warranty applies only to the original purchaser at the original installation address.
If you recently bought a home with a State water heater, the warranty likely did not transfer to you. Check the age of the unit with our free tool and consider a home warranty plan if the unit is aging.
Additional Notes
State Water Heaters is a subsidiary of A.O. Smith Corporation and shares manufacturing facilities. State products are sold through professional plumbing contractors and wholesale distributors. Products carry State-specific branding but are engineered to A.O. Smith standards.
Related brands with similar warranty terms:
State Warranty FAQ
How long is the warranty on a State water heater?
State water heater warranties range from 6 to 10 years for tank coverage, depending on the model series. Parts are typically covered for 10 years and labor for 1 year(s).
Is a State water heater warranty transferable?
No. State warranties are not transferable. Warranty applies only to the original purchaser at the original installation address.
How do I check if my State water heater is still under warranty?
Use our free serial number decoder at WaterHeaterChecker.com to find your manufacture date, then compare the age to State's warranty period for your model. You can also contact State directly at 800-365-0024 with your serial number.
What voids a State water heater warranty?
Common warranty voiding issues for State include: Improper installation; Scale and sediment damage; Commercial use of residential units.
Does State offer an extended warranty?
State does not currently offer a standard extended warranty program. Contact them at 800-365-0024 for current options.
What do I do if my State water heater fails under warranty?
Register your product at statewaterheaters.com. Then locate serial and model numbers on the rating label. Contact State at 800-365-0024 for assistance.
More for Your State Water Heater
Not sure which State model you have?
Check your State water heater's age, model info, and estimated warranty status with our free serial number decoder.
Decode Your State Serial NumberThis information is provided as a helpful reference only. Warranty terms are set by State 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 State or A.O. Smith Corporation.