Here are some unique variants that might help you:
AO Smith Full Unit Replacements - Require the Contractor to call 866-362-9898 first to get an RGA# to give to us. Please include this RGA# in the "Description of Failure" section of this Form.
AO Smith - Requires the original unit tag to file with the claim.
AO Smith Labor - Filing for labor must be done separately by the Contractor.
Hitachi - Unit must be registered before warranty can be submitted. An indoor and outdoor unit will be needed for the registration.
Navien - Plumber must call 800-519-8794 to troubleshoot the issue. Note: Videos and Pictures may be required. If Navien deems the item to be returned, they will provide you with a RGA# to give to us. Please include this RGA# in the "Description of Failure" section of this Form.
SuperStor/HTP - Requires:
1. All Units must be registered in order to submit a claim.
2. Requires Photos/Video
3. The serial number tag from the side of the product.
4. The installation of failed unit(back a few steps from the product to show piping).
5. The failure of unit (if a visible problem) or a picture/video of failed part.
6. The venting (inside and outside for gas appliances only)
7. They also require proof of purchase of failed unit.
Weil McLain - Requires the Contractor to start the claim. Then forward the Claim # to us to continue.