Most homeowners file the warranty card in a drawer and assume the coverage is in place. Sometimes it is. Other times the manufacturer honors a claim only when a few steps were completed in a set order and within a set window. Before you sign the installation paperwork, read the full warranty document, not the one-page summary the salesperson hands you.
Find the start date and what triggers it
A warranty period may begin on the day of purchase, the day of installation, or the day the unit is registered. Each choice favors a different party. Write down which trigger applies to each major component, since a tank, a valve, and a control head may each run on a different clock. If the paperwork says the clock starts at registration and you never register, the years can run out before you have any protection at all.
Confirm who submits the registration
Ask whether the installer, the dealer, or you are responsible for registering the unit. Ask for a copy of what was submitted and the date it was sent. Many manufacturers set a deadline for registration measured in days after installation, and some ask for a serial number photo or the installer's license number. Keep the confirmation email, the portal receipt, or a mailed certificate.
Keep the proof you will need later
When a claim comes up, the company will usually ask for the purchase receipt, the installation invoice, the model and serial numbers, and sometimes a log of service visits. Put these in one folder, paper or digital, and note where the model plate sits on the unit. A claim denied for missing proof is one of the most avoidable kinds of denial.
Ask who pays for labor
Parts coverage and labor coverage are often separate lines. A parts warranty may cover a failed valve while leaving the technician's hours to you. Ask the dealer to state in writing who covers labor on a warranty repair, for how long, and whether travel or diagnostic charges apply.
Check whether service visits are a condition
Some providers tie warranty coverage to scheduled service visits performed by their own technicians. If that is true for your contract, a missed visit could give the company grounds to refuse a claim. Ask whether the service schedule is a condition of the warranty or only an optional add-on, and get the answer in writing.
If the answers come only by phone or sound vague, ask for them in writing before you pay. Our review methodology explains how we look at provider documentation, and the provider directory lets you compare companies side by side.