Arrived to do a performance maintenance. Set system for cooling. Measured the systems static pressure measured a temperature split between return and supply air. Spoke with homeowner about the wear that is caused by the systems static pressure. Set up for a field supervisor to reach out in about a month to finish the diagnosis. Checked interior of the furnace for cleanliness. Found that the fan is collecting dust debris. Went outside and verified refrigerant levels. Verified operation of all electronic and mechanical components. Rinsed coil free of debris. Spoke with homeowner about the system. Air conditioning system is operational at this time.