Abstract: A rotary vacuum-electrical switch controller is particularly applicable for use in an automatic temperature control system in a motor vehicle for selectively interconnecting various vacuum and electrically operated accessories with a vacuum source or an electrical source. The controller includes a valve body including a valve seat having a generally flat circular surface with a plurality of valve ports formed therein. A plurality of valve nipples are connected to the valve ports and the nipples extend from the valve body for connection to a vacuum source and vacuum control devices. A disc-shaped valve plate has a circular surface which faces the valve seat and has a plurality of chambers defined therein by peripherally encompassing radially and circumferentially extending walls. The chambers selectively interconnect various of the ports as the valve plate is rotated.