Included is an indoor device including inside a casing an electrical-component box having electrical components accommodated therein, an indoor-device heat exchanger, and an indoor-device fan to deliver air to the indoor-device heat exchanger. An air conditioner includes a temperature measurement unit to measure a temperature of the indoor-device heat exchanger, and a control unit to determine an upper limit of a rotational speed of the indoor-device fan on the basis of a temperature of the indoor-device heat exchanger measured by the temperature measurement unit, and to execute control to operate the indoor-device fan at a rotational speed equal to or slower than the determined upper limit.