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Common questions
Common Questions
10 totalWhat warranty coverage does the Bosch ZWB 42-3 include if I register it?
If you register within 90 days of installation, the ZWB 42-3 receives a five-year limited warranty covering defects in workmanship or materials, with labor included in the first year. From years 6-10, the heat exchanger is covered against leaks, and from year 11 onwards, a pro-rated warranty applies based on the percentage table in the warranty document. Registration must be completed at https://www.bosch-homecomfort.com/us/en/residential/professionals/bosch-home-comfort-pro.
What is covered under the ZWB 42-3 warranty if I don't register the boiler?
Without registration, you receive a one-year limited warranty covering defects in workmanship or materials with no labor charges included. From years 2-10, the heat exchanger is covered against leaks, and from year 11 onwards, the same pro-rated warranty applies as registered units. However, failure to register will not reduce warranty coverage if you purchased the boiler in Florida or certain other jurisdictions.
How long is the heat exchanger warranted on the ZWB 42-3?
The heat exchanger is warranted to remain free of leaks for ten years from the original installation date, provided the boiler is properly maintained by a qualified heating contractor. From year 11 onwards, BTC provides a limited pro-rated warranty where you pay a percentage of the replacement cost based on years of use (20% at year 11 up to 75% at year 15+).
What maintenance requirements must I follow to keep the ZWB 42-3 warranty valid?
The boiler must be installed and properly maintained by a qualified heating contractor to keep the warranty valid. You must follow all water quality requirements outlined in the installation manual and supporting documentation, and ensure the boiler is not used with polybutylene pipe without an oxygen barrier or connected to radiant heating systems that allow oxygen penetration.
What conditions will void the ZWB 42-3 warranty?
The warranty is voided if the boiler is installed with polybutylene pipe without an oxygen barrier, connected to radiant heating systems allowing oxygen penetration, used over its rated capacity, operated with insufficient water, used with unapproved antifreeze, or if failures result from improper operation, accident, abuse, freezing, or unauthorized alterations. The warranty also voids if water quality requirements are not followed or if repairs are made without proper authorization.
Are serviceable items and normal maintenance covered under the ZWB 42-3 warranty?
No, serviceable items and normal maintenance required per the Installation Manual are not covered by the warranty. You are responsible for performing all required maintenance as outlined in the manual to maintain warranty coverage.
Show 4 more questions
What should I do if I need to file a warranty claim for the ZWB 42-3?
Are other boiler system components delivered with the ZWB 42-3 covered by warranty?
Does the ZWB 42-3 warranty cover damage from contaminated air or hard water buildup?
What antifreeze can I use in the ZWB 42-3 without voiding the warranty?
Full Manual
4 pages
Limited Warranty for Boiler ZWB28-3A23S3124/ZWB42-3A23S3124 Greenstar Combi 100 p/Greenstar Combi 151 p installed in a Residential Application
Models Covered
This limited warranty is provided by Bosch Thermotechnology Corp. (BTC) and covers Bosch Boilers ZWB28-3A23S3124/ZWB42 3A23S3124 - Greenstar Combi 100 p/151 p (part number: 7738100825/7738100611; hereinafter referred to as “Boiler”) installed in a one or two family residential dwelling. This warranty is provided to the original purchaser of the Boiler as long as the Boiler remains installed at its original place of installation.Warranty Coverage
Register Your Boiler And Receive Extended Warranty
Coverage
BTC can better serve its customers if they register the product for warranty coverage. To register your Product, please visit https:// www.bosch-homecomfort.com/us/en/residential/professionals/ bosch-home-comfort-pro. The warranty on the Boiler is as follows:If You Register 1)
First Five Years –Limited Warranty If the Warranty Registration process has been completed within 90 days of date of installation and BTC determines that the Boiler or any part of the Boiler has a defect in workmanship or materials, BTC, at its option, will repair or replace the defective part for up to five years from the date of original installation, provided it is installed and properly maintained by a qualified heating contractor and the other conditions of this warranty are met. During the first year of installation labor charges at BTC approved rates are included, provided the boiler is installed and properly maintained by a qualified heating contractor and the other conditions of this warranty are met. Labor charges are not included for the remaining years. Sixth through tenth year - Limited Warranty for Heat Exchanger BTC warrants that the heat exchanger will remain free of leaks for ten years from the date of original installation provided that the Boiler is properly maintained by a qualified heating contractor and the other conditions of this warranty are met. If during this time BTC determines that the leak is the result of a defect in workmanship or materials, BTC, at its option, will repair or replace the heat exchanger. Labor charges are not included. Eleventh year and beyond - limited Warranty for Heat Exchanger Beginning on the eleventh year from the date of original installation and thereafter, BTC provides a limited pro-rated warranty for defects in the heat exchanger. If BTC determines that the leak is the result of a defect in workmanship or materials BTC will, at its option, repair the defective heat exchanger or replace it with the most comparable model available from BTC at the time of the replacement, provided that the purchaser pays for the proportionate charge set forth below. The proportionate charge is based on the current list price of the heat exchanger involved in the warranty claim (or the nearest comparable Bosch or Buderus model). The purchaser is charged a percentage of the list price of the heat exchanger (at the time of the claim) as detailed below. Years since installation Percentage paid by purchaser 11 20% 12 40% 13 50% 14 60% 15 plus 75% If the heat exchanger is no longer available, BTC will provide a new residential cast aluminum boiler at the then applicable retail price less the proportionate charge for the heat exchanger as set forth in the table above (the charge will be calculated using the last list price of the discontinued heat exchanger). Labor charges are not included.Other Boiler System Components
The Boiler may be delivered with other boiler system components not manufactured by BTC (“Other Components). Other Components are warranted by the manufacturer. BTC also will warrant the Other Components to be free from defects in workmanship and material for one year from the date of installation, provided they are installed and properly maintained by a qualified heating contractor and the other conditions of this warranty are met. If a defect exists in the Other Components, BTC will repair or replace them, if BTC determines that a defect in workmanship or materials exists.If You Do Not Register
First Year - Limited Warranty BTC warrants that the Boiler and Other Components shall remain free from defects in workmanship and materials for one year from the date of original installation, provided they are installed and properly maintained by a qualified heating contractor and the other conditions of this warranty are met. If BTC determines that the Boiler, any part of the Boiler or Other Components has a defect in workmanship or materials, BTC, at its option, will repair or replace the defective part. Labor charges are not included. Second through Tenth Year - Limited Warranty for Heat Exchanger BTC warrants that the heat exchanger will remain free of leaks for ten years from the date of installation provided that the Boiler is properly maintained by a qualified heating contractor and the other conditions of this warranty are met. If during this time BTC determines that the leak is the result of a defect in workmanship or materials, BTC, at its option, will repair or replace the heat exchanger. Labor charges are not included. Eleventh Year and Beyond - Limited Warranty for Heat Exchanger Beginning on the eleventh year from the date of original installation and thereafter, BTC provides the same limited pro-rated warranty for defects in the heat exchanger as provided for Boilers that are registered (see above). 1) Failure to register eligible equipment will not diminish your warranty coverage if you purchased your eligible equipment in Florida, or another jurisdiction that prohibits conditioning a manufacturer's warranty upon product registration. 6720821705 (2024/07) 1Items Not Covered
This limited warranty does not cover the following circumstances:Conditions Of Warranty
The warranty herein is void under the following circumstances:Limited Warranty
Other Than The Obligations Of Btc Expressly Set Forth
Herein, Btc Disclaims All Warranties, Express Or Implied,
Including But Not Limited To Any Implied Warranties Of
Merchantability Or Fitness For A Particular Purpose. Btc’S
Sole Obligation With Respect To The Boiler And Purchaser’S
Exclusive Remedies Are Set Forth In The Foregoing Limited
Warranty. Btc Shall Not Be Liable For Any Indirect, Punitive,
Incidental, Special, Consequential Or Similar Damages
Including, Without Limitation, Injury Or Damage To Persons
Or Property Or Damages For Loss Of Use, Lost Profits,
Inconvenience Or Loss Of Time. Note That Any Repaired Or
Replaced Product Will Be Warranted For Only The
Unexpired Term Of The Original Warranty.
Some states do not allow the exclusion of limitation of damages, or limitations on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.Warranty Claims Process
If you have a warranty claim you should notify the heating contractor who installed your boiler and ask that the contractor notify the distributor from whom the contractor purchased the Boiler. If this action is not possible or you don’t receive a response, contact Bosch Thermotechnology Corp., 50 Wentworth Avenue, Londonderry, NHGarantie limitée pour chaudière ZWB28-3A23S3124/ZWB42-3A23S3124 Greenstar Combi 100 p/Greenstar Combi 151 p installée pour une application résidentielle