Performed AC maintenance. When arriving at the customers house, we turn the thermostat down 10° and then to proceed to work on the furnace blower to find it dirty and needs to be clean. Check the capacitor on the blow to find the readings good. I was not able to get to the coil or to the drain. So we proceed to check the AC unit to find the coil dirty and we cleaned that and put our gauges on to find the pressure all checked out. We proceed to check the capacitor to find the capacitor rusted and, it showing signs of leaking. I did recommend the customer getting a new capacitor, but they are wanting to wait until it goes out. I also did check the filter to find it was clogged up so the customer went ahead and bought two filter from us. Everything checked good AC system working great