Tech arrived on site. Found the batteries to the thermostat to have failed. Replaced them and the unit began to cool. Found the outdoor capacitor to be weak. Replaced it. Found no secondary drain protection on the unit. Installed new safety switch. Cleaned outdoor unit coils. Replaced filter for indoor unit. The indoor unit is covered in dirt. Cleaned out electrical compartment. Heavy cleaning will be required on fall visit. Unit is operational upon departure.