Customer concerned about unit not cooling properly. Checked thermostat calibration and filter location. Checked blower motor operation and inspected evaporator coil condition. Checked safety float switch and inspected drain line. Checked outside condenser unit. Checked start up components and checked refrigerant pressure. The unit is running with low refrigerant pressure. Checked for leaks and located leaking evaporator coil in air handler unit. Heard hissing for coil. Leak detector has confirmed leak. Needs evaporator coil replacement in warranty Suggest to adding refrigerant to keep unit cooling properly. Recommend Taps membership to reduce cost and annual preventative maintenance inspections. Goodman Model # Aspt39c14ba Serial # 1908016528 Warranty Evaporator coil. Follow up on Monday