Rinnai Water Heater Warranty Guide
Manufactured by Rinnai America Corporation · Warranty info last verified: March 2026
Quick Warranty Facts
Tank / H.E. Coverage
10–12 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 Standard high-efficiency non-condensing models. | 10 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+ Condensing Tankless Super high-efficiency condensing models. SE+ is the top tier. | 12 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
Registration is required within 90 days of installation to activate full warranty coverage. Don't skip this step. Missing the deadline may reduce your coverage.
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
- 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.
If you recently bought a home with a Rinnai 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
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 long is the warranty on a Rinnai water heater?
Rinnai water heater warranties range from 10 to 12 years for tank coverage, depending on the model series. Parts are typically covered for 5 years and labor for 1 year(s).
Is a Rinnai water heater warranty transferable?
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 if my Rinnai 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 Rinnai's warranty period for your model. You can also contact Rinnai directly 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 offer an extended warranty?
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. Cost range: Varies by provider.
What do 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. Contact Rinnai at 800-621-9419 for assistance.
More for Your Rinnai Water Heater
Not sure which Rinnai model you have?
Check your Rinnai water heater's age, model info, and estimated warranty status with our free serial number decoder.
Decode Your Rinnai Serial NumberThis information is 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.