Arrived to do a performance maintenance. Set system for cooling. Measured the systems static pressure measured a temperature split between return and supply air. Checked interior of the air handler for cleanliness. Found the blower wheel collecting dust. Went outside and verified refrigerant levels. Verified operation of all electronic and mechanical components. Found that the capacitor for the condenser was failing. Rinsed coil free of debris. Replaced the failing capacitor under system part and labor warranty. Spoke with homeowner about the system. With homeowners approval installed an electrostatic filter and performed a blower wheel cleaning. Air conditioning system is operational at this time.