What is the difference between an estimate and a diagnostic visit?

An estimate describes the proposed work and price; a diagnostic visit investigates the cause of a problem and may carry a charge. Some jobs need testing before a repair can be quoted. Before scheduling, confirm whether the visit is chargeable and whether any fee is credited toward approved work. No automatic fee credit is assumed here.

Are equipment warranties and installation labor warranties the same?

No. A manufacturer’s warranty and the contractor’s labor or workmanship coverage can have different terms and exclusions. Ask which document covers parts, labor, diagnosis, travel, registration, and maintenance requirements. A covered replacement part does not necessarily mean a no-charge service visit. Family’s specific coverage must be confirmed in writing.