Today, I conducted a thorough maintenance check on a Carrier Infinity Series air conditioning unit. The service included cleaning the condenser coils, checking and replacing the air filter, and verifying refrigerant levels with a gauge set to ensure optimal performance. I also tested the thermostat calibration, inspected electrical connections for tightness and signs of wear, and lubricated the fan motor bearings to ensure smooth operation. The drain line was cleared of obstructions and treated with algaecide to prevent future clogs.