Found system, turned off with fan and on position as instructed by Centex. Found stand at air handler wet presumably from melter off after coil was frozen due to extremely restricted evaporator coil. Found customer installed I-Flow system at primary drain line. Introduced 1 gallon of water to drain line and found drain to be functioning properly at this time. Discussed pull and clean with homeowner which was quoted in October of last year. Updated quote to HK13C and customer approved. Received down payment office will contact to schedule.