If you own an air conditioner or heat pump installed in the last 15 years, it almost certainly uses R-410A refrigerant. This refrigerant has been the industry standard since the mid-2000s, but now it's being phased out. The transition started in 2025, and the changes will affect repair costs, equipment availability, and replacement decisions for Orange County homeowners for years to come. Despite what some contractors might tell you, this is not an emergency that requires you to rush out and replace your system immediately. Your existing R-410A system can continue operating for its full expected lifespan of 15 to 20 years with proper maintenance. What is changing: refrigerant costs for repairs are rising significantly, and when you do eventually replace your system, you'll be purchasing equipment that uses new R-454B or R-32 refrigerants with lower environmental impact. This guide explains what's actually happening with the phase-out, separates facts from sales tactics, and helps you make informed decisions about repair versus replacement timing based on your specific situation.