An ice making apparatus for a refrigerator is disclosed. The apparatus includes an ice making compartment; an icemaker disposed in the ice making compartment and including an ice mold body, the ice mold body defining therein a plurality of ice cavities for containing water therein for freezing into ice cubes, and a channel for transport of a working medium, the channel having an outlet; and a temperature sensor disposed in the ice making compartment and adjacent the outlet.