I preformed quality control check on newly installed American standard single gas system. Checked quality of all work to ensure all was installed to customer satisfaction. Educated client on how to make sure the thermostat is holding the current set point the client want it at. All electrical connections were tight and in good condition. Tested and treated drain line to ensure no clogs were present. Temperature across the indoor coil was at 52 supply temp and 73 return air temperature. Refrigerant pressure were within manufacturer specifications range. All electrical on the out door unit was tested and all tested within manufacturer specifications. System does not have surge protection. Unit was in good working condition and cooling upon departure.