When a covered part fails, the contract decides more than whether someone comes to the house. It also decides which kind of part goes into the equipment. Original parts are made by the equipment maker or sold under its name. Equivalent parts are made by someone else and are meant to do the same job. Neither label is a promise about quality, so the useful step is to find out which rule your contract uses and what it means in practice.

Why the part rule changes your decision

Parts decide how the repaired item behaves afterward. An original part is usually built to the exact fit and control signal the equipment was designed around. An equivalent part can be a close match on paper and still differ in size, mounting, or how it talks to the rest of the system. Ask who chooses the route for each covered item, and whether you can see or approve the part before it goes in.

What to read in the contract

Look for the sentence in the repair section that names the part rule. Then check the nearby sections: the list of excluded causes, because a part that failed from an excluded cause may not be covered at all; any wording about the age or model of the equipment; and any note on whether a removed part is kept by the company or returned to you. If the contract says the company chooses the route, check whether it also says it will tell you that choice in writing.

Questions to ask before you sign

Ask each of these in writing, or ask the company to point to the sentence that answers it:

  • Which part route applies to each covered item, original or equivalent?
  • Who makes that choice, and can I see or approve the part before it is installed?
  • If a part is equivalent, what does the contract say about how it is matched to the old one?
  • If the same part fails again, does the route change?
  • Who keeps any part that is removed during a repair?

Compare the rule across providers

When you compare two or more contracts, put the part rule on the same line as the other terms, not in a separate note. Read each contract's own wording rather than a summary of it, and mark every place where a contract says may and every place where it says will. Soft wording in this section leaves the company room to choose, which may suit you or may not. The term-by-term comparison page lines up these rules next to the cancellation and waiting terms, so you can judge the contracts side by side. To read real contract wording before you buy, the sample contract page lists providers that publish their contracts.

How this site shows the figures

This guide does not list prices, limits, or the part rule for any named company. Those details appear in the comparison pages, which are built from each company's own pages and state rosters. The methodology page explains how the published terms are scored, and the flagship table sets out the companies on those same terms. Whatever you read here or there, check the current contract for any company before you rely on a term.