The invention discloses an air conditioner and a control method for the air conditioner, and belongs to the technical field of household appliances. The air conditioner comprises an indoor unit and outdoor unit, wherein the indoor unit comprises a shell, an indoor
heat exchanger and a water pan, the water pan is arranged at the bottom of the indoor
heat exchanger and used for containing condensedwater of the indoor
heat exchanger, and the outdoor unit comprises a compressor and an outdoor heat exchanger. The air conditioner further comprises a water collecting tank and a heating device, wherein the water collecting tank is communicated with the water pan, and the
condensed water in the water pan can enter the water collecting tank through a communication structure; and the heating deviceis arranged corresponding to the water collecting tank and can be used for heating the
condensed water in the water collecting tank. According to the air conditioner, the heating device is arranged toheat the
condensed water, sufficient water is prepared for frosting of the indoor heat exchanger, the frosting and
defrosting are accelerated, the self-cleaning efficiency is improved, the filtered condensed water is used for cleaning, the cleaning effect is improved, secondary
pollution is avoided, and the air quality is improved.