Rinnai Water Heater Warranty Guide
Manufactured by Rinnai America Corporation · Warranty info last verified: March 2026
Rinnai water heaters are covered by Rinnai America Corporation. This guide covers 4 product lines: the HE+ Non-Condensing Tankless (V / RL / RLX Series), HE+ Non-Condensing Tankless, SE / SE+ / RX Condensing Tankless, and RE Condensing Hybrid (Tank + Tankless). Across those lines, tank or heat exchanger coverage climbs from 10 years on the RE Condensing Hybrid (Tank + Tankless) to 15 years on the SE / SE+ / RX Condensing Tankless, parts reach 5 years, and labor runs up to 1 year. The warranty stays with the original owner and does not transfer to later owners, registration is required within 90 days of installation, and claims run through 800-621-9419. An extended warranty program, Extended Labor Coverage (via authorized providers), is also available to lengthen coverage.
Quick Warranty Facts
Tank / H.E. Coverage
10–15 years
Parts Coverage
5 years max
Labor Coverage
1 year
Transferable
No
Extended Warranty
Available
Registration Required
Yes: within 90 days
Warranty by Product Line
Coverage periods vary by model series. Check your model against the table below.
| Product Line | Tank / H.E. | Parts | Labor |
|---|---|---|---|
HE+ Non-Condensing Tankless (V / RL / RLX Series) High-efficiency non-condensing models -- 12-year heat exchanger coverage. | 12 yr | 5 yr | 1 yr |
HE+ Non-Condensing Tankless Enhanced non-condensing models with longer heat exchanger coverage. | 12 yr | 5 yr | 1 yr |
SE / SE+ / RX Condensing Tankless Super high-efficiency condensing models (SENSEI SE/SE+ and RX) -- 15-year heat exchanger coverage. | 15 yr | 5 yr | 1 yr |
RE Condensing Hybrid (Tank + Tankless) Hybrid model combining an 80-gallon storage tank with tankless technology. | 10 yr | 5 yr | 1 yr |
How to Register Your Rinnai Water Heater
Rinnai requires registration within 90 days of installation to activate full coverage on your chosen line (4 are covered here). Missing that 90-day window can reduce your coverage, so complete it right after install.
You will need:
- Serial number (from the rating label)
- Model number
- Installation date
- Installer's name and contact info
- Your name and address
Have these ready before the 90-day Rinnai deadline passes.
What's Covered
- Defects in materials and workmanship under normal residential use
- HE+ Non-Condensing Tankless (V / RL / RLX Series): 12-year heat exchanger coverage, 5-year parts, and 1-year labor
- HE+ Non-Condensing Tankless: 12-year heat exchanger coverage, 5-year parts, and 1-year labor
- SE / SE+ / RX Condensing Tankless: 15-year heat exchanger coverage, 5-year parts, and 1-year labor
- RE Condensing Hybrid (Tank + Tankless): 10-year tank and compressor coverage, 5-year parts, and 1-year labor
- Heat exchanger failure on the HE+ Non-Condensing Tankless (V / RL / RLX Series), HE+ Non-Condensing Tankless, SE / SE+ / RX Condensing Tankless, and RE Condensing Hybrid (Tank + Tankless)
What's NOT Covered
Rinnai lists 5 situations that fall outside coverage on its 4 lines:
- Units not purchased from an authorized Rinnai dealer
- Improper installation or failure to follow the installation manual
- Lack of annual descaling or maintenance (especially in hard water areas)
- Use of non-approved venting materials
- Scale or lime buildup damage
Extended Warranty: Extended Labor Coverage (via authorized providers)
Cost Range
Varies by provider
Additional Years
+10 years
Includes Labor
Yes
Buy at Install
No
Rinnai works with third-party warranty providers (such as Trinity Warranty) who offer up to 10 years of labor coverage for tankless and hybrid models.
How to File a Rinnai Warranty Claim
- 1
Register your product at rinnai.us/registration within 90 days of purchase
- 2
Contact Rinnai support at 800-621-9419 with your serial number
- 3
Rinnai technical support will troubleshoot the issue before issuing a warranty claim number
- 4
Contact a licensed Rinnai service provider for repair
- 5
Keep proof of annual maintenance - heat exchanger claims may require documentation
Rinnai warranty line: 800-621-9419
Warranty Transferability: No
Standard warranty is not transferable. Registered units purchased from authorized dealers may have different terms.
Bought a home that came with a Rinnai unit? Because Rinnai 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 Rinnai line at 800-621-9419 (labor help is limited to 1 year from install).
Additional Notes
Rinnai offers up to 5 years of limited labor coverage when the unit is registered within 90 days of purchase, which is one of the most generous labor warranties in the tankless category. Units must be purchased from an authorized dealer for full warranty coverage. Unauthorized seller purchases may have reduced coverage.
Rinnai Warranty FAQ
How many years does the Rinnai tank warranty last?
Rinnai tank or heat exchanger coverage ranges from 10 to 15 years, from the RE Condensing Hybrid (Tank + Tankless) up to the SE / SE+ / RX Condensing Tankless. Parts are covered for up to 5 years and labor for up to 1 year.
Can I transfer a Rinnai water heater warranty to a new owner?
No. Rinnai warranties are not transferable. Standard warranty is not transferable. Registered units purchased from authorized dealers may have different terms.
How do I check whether my Rinnai 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 (HE+ Non-Condensing Tankless (V / RL / RLX Series), HE+ Non-Condensing Tankless, SE / SE+ / RX Condensing Tankless, and RE Condensing Hybrid (Tank + Tankless)). You can also call Rinnai at 800-621-9419 with your serial number.
What voids a Rinnai water heater warranty?
Common warranty voiding issues for Rinnai include: Units not purchased from an authorized Rinnai dealer; Improper installation or failure to follow the installation manual; Lack of annual descaling or maintenance (especially in hard water areas).
Does Rinnai sell an extended warranty for the HE+ Non-Condensing Tankless (V / RL / RLX Series), HE+ Non-Condensing Tankless, SE / SE+ / RX Condensing Tankless, and RE Condensing Hybrid (Tank + Tankless)?
Yes. Rinnai offers Extended Labor Coverage (via authorized providers): Rinnai works with third-party warranty providers (such as Trinity Warranty) who offer up to 10 years of labor coverage for tankless and hybrid models. It adds 10 years of coverage, includes labor, and costs Varies by provider.
What should I do if my Rinnai water heater fails under warranty?
Register your product at rinnai.us/registration within 90 days of purchase. Then contact Rinnai support at 800-621-9419 with your serial number. The Rinnai warranty line is 800-621-9419.
More for Your Rinnai Water Heater
Not sure which of Rinnai's 4 lines you have?
Coverage differs across Rinnai's lines, so decode your serial number to find the manufacture date and match it to the right 4-line warranty range above.
Decode Your Rinnai Serial NumberThe 4 coverage figures shown above were last verified in March 2026 and are provided as a helpful reference only. Warranty terms are set by Rinnai 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 Rinnai or Rinnai America Corporation.