Navien Water Heater Warranty Guide
Manufactured by Navien Inc. · Warranty info last verified: March 2026
Quick Warranty Facts
Tank / H.E. Coverage
10–15 years
Parts Coverage
5 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 |
|---|---|---|---|
NPE-A2 Condensing Tankless Premium condensing tankless. 15-year heat exchanger warranty is among the best in the industry. | 15 yr | 5 yr | 1 yr |
NPE-S2 Condensing Tankless High-efficiency condensing tankless. | 15 yr | 5 yr | 1 yr |
NFC Condensing Combi-Boiler Combination space heating and hot water unit. | 15 yr | 5 yr | 1 yr |
NFB Condensing Boiler Heating-only boiler. | 10 yr | 5 yr | 1 yr |
How to Register Your Navien Water Heater
Product registration is strongly recommended, even if not strictly required. It ensures Navien 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
- Failure to perform annual maintenance or descaling
- Hard water damage without water treatment
- Improper installation
- Commercial use of residential models
- Use of non-authorized parts in repairs
How to File a Navien Warranty Claim
- 1
Register your product at navien.com/product-registration
- 2
Contact Navien support at 800-519-8794
- 3
Technical support will help diagnose the issue remotely
- 4
If a warranty claim is approved, Navien dispatches through their authorized service provider network
Navien warranty line: 800-519-8794
Warranty Transferability: No
Standard warranty is for the original purchaser only.
If you recently bought a home with a Navien 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
Navien's 15-year heat exchanger warranty is one of the longest available in the tankless water heater industry and is a major selling point. Navien also features a built-in recirculation pump. Professional installation by a licensed contractor is required for warranty coverage.
Navien Warranty FAQ
How long is the warranty on a Navien water heater?
Navien water heater warranties range from 10 to 15 years for tank coverage, depending on the model series. Parts are typically covered for 5 years and labor for 1 year(s).
Is a Navien water heater warranty transferable?
No. Navien warranties are not transferable. Standard warranty is for the original purchaser only.
How do I check if my Navien 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 Navien's warranty period for your model. You can also contact Navien directly at 800-519-8794 with your serial number.
What voids a Navien water heater warranty?
Common warranty voiding issues for Navien include: Failure to perform annual maintenance or descaling; Hard water damage without water treatment; Improper installation.
Does Navien offer an extended warranty?
Navien does not currently offer a standard extended warranty program. Contact them at 800-519-8794 for current options.
What do I do if my Navien water heater fails under warranty?
Register your product at navien.com/product-registration. Then contact navien support at 800-519-8794. Contact Navien at 800-519-8794 for assistance.
More for Your Navien Water Heater
Not sure which Navien model you have?
Check your Navien water heater's age, model info, and estimated warranty status with our free serial number decoder.
Decode Your Navien Serial NumberThis information is provided as a helpful reference only. Warranty terms are set by Navien 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 Navien or Navien Inc..