A laundry treatment apparatus and a method for controlling a laundry treatment apparatus are provided. The method may include supplying alternating current at a predetermined first frequency to a compressor; measuring a first time a temperature of refrigerant discharged from the compressor; measuring a second time a temperature of the refrigerant discharged from the compressor, when a predetermined first reference time has passed after the measuring the first time of the temperature of the refrigerant discharged from the compressor; and controlling the first frequency of the alternating current based on a difference between the temperature measured the first time and the temperature measured the second time.