Make all repairs necessary to restore the unit to full health and eliminate all other concerns. Customer explained she was having issues with heating system, after inspection of system found that unit had a failed defrost control board that was causing unit to have intermittent issues. Also the thermostat was not activating the heat strips, blower capacitor was also testing weak. Customer approved repair today. Replaced failed thermostat, failed defrost control board, replaced weak blower capacitor, and added uvc lamp.