Request the history, not another guess

Gather invoices showing how much refrigerant was added, when it was added, and what tests were recorded. Include the symptoms before and after each visit.

Ask whether an actual leak was found, where it was located, and what test supported that conclusion. Leak detection is a separate part of professional repair, rather than an inference from cooling performance alone. Carrier refrigerant-leak guidance.

Then ask what evidence supports the newly identified component fault. What failed, what measurement or test showed it, and how does it explain the symptoms? A component fault and a refrigerant problem can coexist, so the new diagnosis does not automatically disprove the old one.

Decide what needs correction now

Request a written explanation of whether the current refrigerant charge is appropriate and whether further leak investigation is recommended. The provider should use the procedure specified for the installed equipment and actual operating conditions.

Do not ask for a top-up just because one was performed last summer. If a component repair is supported, ask how the technician will verify cooling performance afterward and whether the earlier unresolved concern still needs attention.

If prior visits lack records, say so. Missing evidence means the old diagnosis may remain uncertain; it is not proof that the earlier company acted improperly.

Compare the proposed work

Ask for the total cost of the component repair, any necessary refrigerant or leak work, and the repair warranty. Make sure the proposal distinguishes work confirmed as necessary from work that depends on further testing.

If explanations keep changing without measurements, request a service-manager review or an independent diagnosis. Share the complete history so the next provider can assess the pattern instead of starting from “it always needs refrigerant.”

Your next step is a documented comparison of the old and new findings. Approve a repair that addresses a demonstrated fault, then keep the test results with your home records. That gives the next visit a reliable starting point if the symptoms return.