System for controlling a vehicle mounted air conditioner

A system for automatically controlling a vehicle mounted air conditioner having an air intake port for introducing outer air, cabin air or a mixture thereof, an air intake door controlling the source and mixture of the intake air, and a vacuum-operated air intake door actuator, a hot air passage, a cold air passage, an air mix door controlling the proportions of the intake air passing through the hot air passage and the cold air passage, and an air mixing door actuator, a plurality of blower outlets for conditioned air and a blower outlet door for each of said blower outlets, in which the flow of conditioned air through the outlets is in response to a controlling program of an automatic temperature adjusting system in either an automatic selection mode or a manual selection mode,

• wherein the improvement is characterized in that the system comprises a mode controlling vacuum switch for placing the system in either the automatic selection mode or the manual selection mode, a controlling vacuum circuit system controlled by said vacuum switch for supplying a uni-directional vacuum signal and including said air intake door actuator, a shift actuator for actuating said blower outlet doors, and vacuum selectors for transmitting the vacuum signal from said vacuum switch to the shift actuator and the air intake door actuator, said vacuum selectors being controlled by a temperature-responsive power servo.