Clothes treatment apparatus and method for controlling a clothes treatment apparatus

A clothes treatment apparatus, comprising:

• a drying duct, through which air is suctioned in at an upper rear side of an outer circumferential surface of a tub and supplied to a front side of the tub;
• a first blower fan located in the drying duct that circulates interior air within the drying duct;
• a filter provided adjacent to the outer circumferential surface of the tub to remove lint contained in the air circulating through the drying duct;
• and
• a sensor that senses clogging of the filter, wherein the clothes treatment apparatus is configured to switch a flow of air from the outer circumferential surface of the tub to a front side of the tub to a flow of air from the front side of the tub to the outer circumferential surface of the tub so as to separate lint attached to the filter, if the clogging of the filter is sensed.