This morning, I conducted the yearly preventative maintenance on a Rheem Classic Series central air conditioning system at a local home. I started by thoroughly cleaning the condenser coils on the outdoor unit using a non-acidic coil cleaner and a soft-bristle brush. Next, I replaced the MERV 8 air filter in the air handler and inspected all electrical components, ensuring proper voltage and amperage. I also checked the refrigerant charge and performed a leak test, finding no issues. The system is now operating at peak efficiency and performance.