An air-conditioning apparatus comprising: a refrigerant circuit through which refrigerant circulates in an order of a compressor, a condenser, an expansion mechanism, and an evaporator; a condensing temperature sensor configured to sense a condensing temperature which represents a refrigerant temperature in the condenser; an air blower configured to regulate a volume of air sent to the condenser; an air-conditioning load sensor device configured to sense air-conditioning load; and a controller configured to control a volume of air sent by the air blower, the controller having a first mode used during normal operation and a second mode different from the first mode as operation modes, in the second mode, the controller being configured to have the air blower operate to vary a volume of air between a first volume of air and a second volume of air larger than the first volume of air with variation in condensing temperature, and in the first mode, the controller being configured to change the operation mode from the first mode to the second mode when the air-conditioning load sensed by the air-conditioning load sensor device becomes lower than a threshold value, in the second mode, the controller being configured to change the operation mode from the second mode to the first mode when the air-conditioning load becomes higher than the threshold value, wherein in the second mode, the controller is configured to change a volume of air sent by the air blower from the first volume of air to the second volume of air when the condensing temperature becomes higher than a first temperature, and change a volume of air sent by the air blower from the second volume of air to the first volume of air when the condensing temperature becomes lower than a second temperature lower than the first temperature. a refrigerant circuit through which refrigerant circulates in an order of a compressor, a condenser, an expansion mechanism, and an evaporator; a condensing temperature sensor configured to sense a condensing temperature which represents a refrigerant temperature in the condenser; an air blower configured to regulate a volume of air sent to the condenser; an air-conditioning load sensor device configured to sense air-conditioning load; and a controller configured to control a volume of air sent by the air blower, the controller having a first mode used during normal operation and a second mode different from the first mode as operation modes, in the second mode, the controller being configured to have the air blower operate to vary a volume of air between a first volume of air and a second volume of air larger than the first volume of air with variation in condensing temperature, and in the first mode, the controller being configured to change the operation mode from the first mode to the second mode when the air-conditioning load sensed by the air-conditioning load sensor device becomes lower than a threshold value, in the second mode, the controller being configured to change the operation mode from the second mode to the first mode when the air-conditioning load becomes higher than the threshold value, wherein in the second mode, the controller is configured to change a volume of air sent by the air blower from the first volume of air to the second volume of air when the condensing temperature becomes higher than a first temperature, and change a volume of air sent by the air blower from the second volume of air to the first volume of air when the condensing temperature becomes lower than a second temperature lower than the first temperature.