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 furnace for cleanliness. Found that the evaporator pan has been dripping into the furnace. Reached out to a field supervisor to get a second set of eyes on the condensation pan to help determine where this condensation is coming from. 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.