Arrived to find thermostat set to 75 and was satisfied at 75. Turned system in and let run for approximately 40 mins and set my meter besides the T stat. Quickly determine the eco bee stat was 3 degrees off in temp and almost 10% off in humidity readings. Recalibrated thermostat to read correct temps and humidity. Drain line had some back up cleared and flushed with water and assured proper flow. Made client aware and system is back to normal