DCM3: AC complete, checked 16x20x4 filter, replaced upstairs (1) 16x25x1 filter and gave homeowner (1) 16x25x1 filter. Basement system is fully functional and operating within manufacturer specifications at this time. Refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions. Main floor system is fully functional and operating within manufacturer specifications at this time. Refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions. Upstairs system is fully functional and operating within manufacturer specifications at this time. Refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions. When clearing drain line noticed growth building on bend in drain line. Talked to homeowner about running her drain with a downward slope to ensure drainage and help prevent growth/clogs. She approved. Re ran drain line with more downward fall and tested. No leaks, blew through drain