{System #3} - Tech found thermostat calling for cool upon arrival, but outdoor unit not running. Contactor received 24v call and pulled in contacts. 240v power is present on line side but not on load side. - Replaced contactor and confirmed refrigerant charge and operation. - Outdoor ambient temp sensor was out of range causing a single flash code on defrost control. Tech reset the sensor and cleared code. - Advised customer that both capacitors are slightly weaker than their correct ratings. System is operating normally at this time. Thermostat set to 72 at tech departure.