Bosch Water Heater Warranty Guide
Manufactured by Bosch Thermotechnology · Warranty info last verified: March 2026
Bosch water heaters are covered by Bosch Thermotechnology. This guide covers 3 product lines: the Electric Point-of-Use (Tronic Series), Thermotechnology Tankless Gas (Greentherm Series), and Non-Condensing Tankless Gas. Across those lines, tank or heat exchanger coverage climbs from 7 years on the Electric Point-of-Use (Tronic Series) to 15 years on the Thermotechnology Tankless Gas (Greentherm Series), parts reach 7 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 800-233-1199.
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
Bosch requires registration within 90 days of installation to activate full coverage on your chosen line (3 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 Bosch deadline passes.
What's Covered
- Defects in materials and workmanship under normal residential use
- Electric Point-of-Use (Tronic Series): 7-year tank coverage, 7-year parts, and 1-year labor
- Thermotechnology Tankless Gas (Greentherm Series): 15-year heat exchanger coverage, 5-year parts, and 1-year labor
- Non-Condensing Tankless Gas: 10-year heat exchanger coverage, 5-year parts, and 1-year labor
- Heat exchanger failure on the Thermotechnology Tankless Gas (Greentherm Series) and Non-Condensing Tankless Gas
What's NOT Covered
Bosch lists 4 situations that fall outside coverage on its 3 lines:
- 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.
Bought a home that came with a Bosch unit? Because Bosch 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 Bosch line at 800-233-1199 (labor help is limited to 1 year from install).
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 many years does the Bosch tank warranty last?
Bosch tank or heat exchanger coverage ranges from 7 to 15 years, from the Electric Point-of-Use (Tronic Series) up to the Thermotechnology Tankless Gas (Greentherm Series). Parts are covered for up to 7 years and labor for up to 1 year.
Can I transfer a Bosch water heater warranty to a new owner?
No. Bosch warranties are not transferable. Warranty is for the original purchaser and does not transfer to subsequent owners.
How do I check whether my Bosch 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 (Electric Point-of-Use (Tronic Series), Thermotechnology Tankless Gas (Greentherm Series), and Non-Condensing Tankless Gas). You can also call Bosch 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 sell an extended warranty for the Electric Point-of-Use (Tronic Series), Thermotechnology Tankless Gas (Greentherm Series), and Non-Condensing Tankless Gas?
The Electric Point-of-Use (Tronic Series), Thermotechnology Tankless Gas (Greentherm Series), and Non-Condensing Tankless Gas carry only the standard Bosch factory warranty shown above; no separate extended plan is listed. Ask about dealer coverage when you call 800-233-1199.
What should 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. The Bosch warranty line is 800-233-1199.
More for Your Bosch Water Heater
Not sure which of Bosch's 3 lines you have?
Coverage differs across Bosch's lines, so decode your serial number to find the manufacture date and match it to the right 3-line warranty range above.
Decode Your Bosch Serial NumberThe 3 coverage figures shown above were last verified in March 2026 and are 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.