Reliance Water Heater Warranty Guide
Manufactured by A.O. Smith Corporation · Warranty info last verified: March 2026
Reliance water heaters are manufactured by A.O. Smith Corporation. This guide covers 3 product lines: the Standard Tank, Mid-Grade Tank, and Premium Tank. Across those lines, tank or heat exchanger coverage climbs from 6 years on the Standard Tank to 12 years on the Premium Tank, 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 800-937-1479.
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 |
|---|---|---|---|
Standard Tank Entry-level residential line. Available at some retail and wholesale locations. | 6 yr | 6 yr | 1 yr |
Mid-Grade Tank Mid-tier residential models. | 9 yr | 9 yr | 1 yr |
Premium Tank Premium models with extended coverage. | 12 yr | 12 yr | 1 yr |
How to Register Your Reliance Water Heater
There is no strict registration deadline listed for Reliance, 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 800-937-1479 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 Reliance paperwork in case you later call 800-937-1479.
What's Covered
- Defects in materials and workmanship under normal residential use
- Standard Tank: 6-year tank coverage, 6-year parts, and 1-year labor
- Mid-Grade Tank: 9-year tank coverage, 9-year parts, and 1-year labor
- Premium Tank: 12-year tank coverage, 12-year parts, and 1-year labor
What's NOT Covered
Reliance lists 4 situations that fall outside coverage on its 3 lines:
- Improper installation
- Scale and sediment buildup
- Labor after year one
- Commercial use of residential units
How to File a Reliance Warranty Claim
- 1
Locate serial and model numbers on the unit's rating label
- 2
Call Reliance customer service at 800-937-1479
- 3
Work with an authorized service provider for diagnosis and repair
- 4
Warranty parts provided at no cost during coverage period
Reliance warranty line: 800-937-1479
Warranty Transferability: No
Warranty is for the original purchaser at the original installation address only.
Bought a home that came with a Reliance unit? Because Reliance 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 Reliance line at 800-937-1479 (labor help is limited to 1 year from install).
Additional Notes
Reliance Water Heaters are manufactured by A.O. Smith Corporation. Products are sold through retail and professional channels. Warranty support follows A.O. Smith standards.
Related brands with similar warranty terms:
Reliance Warranty FAQ
How many years does the Reliance tank warranty last?
Reliance tank or heat exchanger coverage ranges from 6 to 12 years, from the Standard Tank up to the Premium Tank. Parts are covered for up to 12 years and labor for up to 1 year.
Can I transfer a Reliance water heater warranty to a new owner?
No. Reliance warranties are not transferable. Warranty is for the original purchaser at the original installation address only.
How do I check whether my Reliance 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 (Standard Tank, Mid-Grade Tank, and Premium Tank). You can also call Reliance at 800-937-1479 with your serial number.
What voids a Reliance water heater warranty?
Common warranty voiding issues for Reliance include: Improper installation; Scale and sediment buildup; Labor after year one.
Does Reliance sell an extended warranty for the Standard Tank, Mid-Grade Tank, and Premium Tank?
The Standard Tank, Mid-Grade Tank, and Premium Tank carry only the standard Reliance factory warranty shown above; no separate extended plan is listed. Ask about dealer coverage when you call 800-937-1479.
What should I do if my Reliance water heater fails under warranty?
Locate serial and model numbers on the unit's rating label. Then call Reliance customer service at 800-937-1479. The Reliance warranty line is 800-937-1479.
More for Your Reliance Water Heater
Not sure which of Reliance's 3 lines you have?
Coverage differs across Reliance'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 Reliance 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 Reliance 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 Reliance or A.O. Smith Corporation.