An ice maker having an ice tray horizontally suspended within a housing and a drive body rotatably coupled to a transverse axis of the ice tray and configured to oscillate the ice tray about the transverse axis. The cold side of a thermoelectric device is thermally coupled with a bottom surface of the ice tray, and a hot side opposes the cold side. A barrier extends around the periphery of the ice tray within the housing, and separates the housing into a first chamber and a second air chamber. A heat sink is thermally coupled with the hot side of the thermoelectric device and extends into the second air chamber. An intake duct member is coupled with the housing proximate the second air chamber, and is configured to dispense a cold air flow over the heat sink. The barrier restricts the cold air flow from entering the first chamber.