Performed a PCSA 2024 prepaid heat pump heating maintenance in Creal Springs, IL on a Trane XL16i system. Inspected the outdoor condenser coil and cleaned it using a coil cleaner. Checked refrigerant levels and measured system pressures using a manifold gauge set. Verified proper operation of the reversing valve and defrost cycle. Inspected electrical connections, tested capacitor performance, and ensured the thermostat accurately controlled both heating and auxiliary modes. Completed a full system performance check.