Customer concerned about unit not cooling properly. Checked blower motor operation and inspected equipment cabinet. Checked thermostat calibration and filter location. Filter is good. Checked refrigerant levels and check test start up components. Unit is not running. Checked power and located tripped breaker in main breaker panel. Reset breaker and checked operation. Refrigerant levels are good and condenser unit is cooling properly. Customer concerned about a credit payment in full for tune up last month. Customer rescheduled due to illness. Please follow up with maintenance tune up.