Customer concerned about unit not cooling. Check thermostat calibration and filter location. Checked blower motor operation and inspected equipment cabinet. Checked refrigerant levels and check test start up components. Located low refrigerant on 410a. Customer has approved to add refrigerant. Added 2 lb r410a refrigerant and checked unit operation. Unit is cooling well and drains at this time. Comfort advisor to estimate unit replacement. Jeff is on site.