2025 PCSA AC Check Up Prepaid AC Maintenance Technician checked the wire connections, replaced the filter and washed filters, made sure the thermostat was operating normally, checked the Freon levels and they were looking good, cleaned outdoor coil, on the older unit when tech was flushing the drain lines. It was not flushing properly. Technician blew it out with CO2 and the drain line is working properly now.