Why it matters to you
Your system's refrigerant type shapes repair and replacement decisions during the federal shift away from R-410A. In a Houston summer, when an AC can run most of the day, even a small refrigerant loss shows up quickly as weak cooling — and a system that needs more refrigerant has a leak.
Practical guidance
Find the refrigerant type on the outdoor unit's data plate, usually next to the factory charge — no tools or panel removal needed. Adding, recovering or testing refrigerant requires an EPA Section 608-certified technician; it is never a homeowner task.