I arrived at the customer's home to find a cooling unit with water inside the secondary pan. I discovered that the clean-out cap was filled with water, indicating a drain treatment was necessary. I informed the customer of the situation and performed the drain treatment. I also noticed a double trap, one at the air handler unit and one outside. I cleared the trap at the air handler unit but left the one outside, as it could cause drainage issues. The double trap was clogged, and it took longer than expected to clear it. The evaporator coil and blower needed to be pulled and cleaned, and the system required a thorough maintenance. I cleaned the drain pan thoroughly, and the system was now draining properly with a steady stream of water. The customer paid $189 using a credit card. He agreed to schedule a maintenance appointment for the pull and clean of the blower and evaporator coil in a couple of weeks.