A repair can have two separate clocks running on it. The parts clock tracks the components made by the manufacturer. The labor clock tracks the work of installing or fixing them. Each can start on a different day, run for a different length, and end on its own terms.
Find the start day for each clock
Read the paper and find what the start date is tied to. Some warranties start on the day of purchase, some on the day of installation, and some on a registration date. The date that counts is the one written in the document, not the date you remember.
Keep the sales receipt, the installation invoice, and any registration confirmation together. If the start date depends on the install, the invoice is the record that shows it.
Read the parts clock and the labor clock separately
A parts warranty usually covers the named components when they fail under normal use, provided the unit has been installed and maintained as the manufacturer describes. The document will name those conditions. Read them closely.
A labor warranty usually comes from the installer or service provider and covers the work of fixing a covered part. It often has its own term, its own conditions, and sometimes its own list of who may do the work.
When a part is covered and the labor is not, you may still pay for the visit. When the labor is covered and the part is not, the visit may be covered while the part is billed. Check which case you have before you schedule anything.
Questions to ask before you accept the paper
Ask what starts the clock. Ask whether the clock is extended by registration or by an annual service visit, and what that visit must include to count. Ask who may perform covered work, and whether a licensed professional is required. Ask whether the warranty transfers to a new owner and what that transfer requires. Ask what evidence the company needs for a claim, and how long it has to reach a decision.
Ask for the answers in writing. A verbal answer is a note. A written answer is a term you can check.
What this site publishes and what it does not
This page explains how the clocks generally work. It does not describe what any named company's warranty covers, and it does not say whether a claim will be paid. The service life figures on this site are planning inputs, and they sit in the tables. A good starting point is The major appliances, ranked by typical service life.