Bosch Water Heater Warranty Guide
Manufactured by Bosch Thermotechnology · Warranty info last verified: March 2026
Quick Warranty Facts
Tank / H.E. Coverage
7–15 years
Parts Coverage
7 years max
Labor Coverage
1 year
Transferable
No
Extended Warranty
N/A
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 |
|---|---|---|---|
Electric Point-of-Use (Tronic Series) 7-year warranty on small point-of-use electric storage units. Compact and under-sink designs. | 7 yr | 7 yr | 1 yr |
Thermotechnology Tankless Gas (Greentherm Series) 15-year heat exchanger warranty on condensing tankless gas models. Industry-leading coverage. | 15 yr | 5 yr | 1 yr |
Non-Condensing Tankless Gas Standard tankless gas models with 10-year heat exchanger coverage. | 10 yr | 5 yr | 1 yr |
How to Register Your Bosch 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
- Improper installation
- Lack of annual maintenance or descaling
- Scale and lime buildup from hard water
- Use outside of specified operating parameters
How to File a Bosch Warranty Claim
- 1
Register your product within 90 days at bosch-climate.us
- 2
Contact Bosch Thermotechnology at 800-233-1199
- 3
Technical support assists with troubleshooting and warranty validation
- 4
Authorized service provider handles diagnosis and repair
Bosch warranty line: 800-233-1199
Warranty Transferability: No
Warranty is for the original purchaser and does not transfer to subsequent owners.
If you recently bought a home with a Bosch 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
Bosch Thermotechnology (now Bosch Home Comfort) is a German manufacturer with a strong reputation for quality. Their condensing tankless gas units offer a 15-year heat exchanger warranty. Point-of-use electric units are a specialty, offering solutions where traditional tank heaters won't fit.
Bosch Warranty FAQ
How long is the warranty on a Bosch water heater?
Bosch water heater warranties range from 7 to 15 years for tank coverage, depending on the model series. Parts are typically covered for 7 years and labor for 1 year(s).
Is a Bosch water heater warranty transferable?
No. Bosch warranties are not transferable. Warranty is for the original purchaser and does not transfer to subsequent owners.
How do I check if my Bosch 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 Bosch's warranty period for your model. You can also contact Bosch directly at 800-233-1199 with your serial number.
What voids a Bosch water heater warranty?
Common warranty voiding issues for Bosch include: Improper installation; Lack of annual maintenance or descaling; Scale and lime buildup from hard water.
Does Bosch offer an extended warranty?
Bosch does not currently offer a standard extended warranty program. Contact them at 800-233-1199 for current options.
What do I do if my Bosch water heater fails under warranty?
Register your product within 90 days at bosch-climate.us. Then contact bosch thermotechnology at 800-233-1199. Contact Bosch at 800-233-1199 for assistance.
More for Your Bosch Water Heater
Not sure which Bosch model you have?
Check your Bosch water heater's age, model info, and estimated warranty status with our free serial number decoder.
Decode Your Bosch Serial NumberThis information is provided as a helpful reference only. Warranty terms are set by Bosch 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 Bosch or Bosch Thermotechnology.