Arrived to do a dual performance maintenance. Checked the blower for cleanliness. Found dust and debris coating the blower wheel. Checked the heat exchanger. Found pock marks and hot spots. Performed an electronic gas leak search. Set up for combustion analysis temperature split and static pressure tests. Verified operation of all mechanical and electronic components of the furnace. Set system for cooling. Measured the systems static pressure and 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. Spoke with homeowner about the system. Furnace and ac are operational at this time.