Service diagnostic found that the low voltage wiring at the outdoor unit had come loose. This was preventing any electrical signal from getting to the outdoor unit. I also found the drain line has some build up in it. I spoke with the homeowner and presented repair options. She chose to have the outdoor electrical wiring repaired. I stripped back new wire and tightened all outdoor connections. I also used electrical tape to help prevent any loose connections in the future. I then cycled power at the thermostat and function tested the system. The system is operational at completion of service.