Noritz Water Heater Warranty Guide
Manufactured by Noritz America Corporation · Warranty info last verified: March 2026
Quick Warranty Facts
Tank / H.E. Coverage
12 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 |
|---|---|---|---|
EZ Series Tankless Standard residential tankless line. | 12 yr | 5 yr | 1 yr |
CB Combi-Boiler Combination space heating and hot water unit. | 12 yr | 5 yr | 1 yr |
How to Register Your Noritz Water Heater
Product registration is strongly recommended, even if not strictly required. It ensures Noritz 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
- Scale and lime buildup from hard water
- Improper installation or venting
- Lack of annual maintenance
- Use of unauthorized parts
How to File a Noritz Warranty Claim
- 1
Register your product at noritz.com
- 2
Contact Noritz support at 866-766-7489
- 3
Work with an authorized service provider for diagnosis and repair
Noritz warranty line: 866-766-7489
Warranty Transferability: No
Warranty is for the original owner only and is not transferable.
If you recently bought a home with a Noritz 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
Noritz is a Japanese manufacturer that has been making tankless water heaters since 1951. They focus exclusively on tankless technology and are sold through professional contractors.
Noritz Warranty FAQ
How long is the warranty on a Noritz water heater?
Noritz water heaters have a 12-year tank warranty. Parts are typically covered for 5 years and labor for 1 year(s).
Is a Noritz water heater warranty transferable?
No. Noritz warranties are not transferable. Warranty is for the original owner only and is not transferable.
How do I check if my Noritz 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 Noritz's warranty period for your model. You can also contact Noritz directly at 866-766-7489 with your serial number.
What voids a Noritz water heater warranty?
Common warranty voiding issues for Noritz include: Scale and lime buildup from hard water; Improper installation or venting; Lack of annual maintenance.
Does Noritz offer an extended warranty?
Noritz does not currently offer a standard extended warranty program. Contact them at 866-766-7489 for current options.
What do I do if my Noritz water heater fails under warranty?
Register your product at noritz.com. Then contact noritz support at 866-766-7489. Contact Noritz at 866-766-7489 for assistance.
More for Your Noritz Water Heater
Not sure which Noritz model you have?
Check your Noritz water heater's age, model info, and estimated warranty status with our free serial number decoder.
Decode Your Noritz Serial NumberThis information is provided as a helpful reference only. Warranty terms are set by Noritz 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 Noritz or Noritz America Corporation.