Arrived to do a performance maintenance. Set system for cooling. Measured the systems static pressure measured a temperature split between return and supply air. Went outside and verified refrigerant levels. Verified operation of all electronic and mechanical components. Rinsed coil free of debris. Went back inside and checked interior of the furnace for cleanliness. Spoke with homeowner about the system. With homeowners approval installed a condensation safety switch. Air conditioning system is operational at this time.