Manual Temperature Control: Description

The Chevette and Vega air conditioning system is known as the Accumulator/Clutch Cycle System. This system utilizes an accumulator located at evaporator outlet, and an expansion tube located in the evaporator inlet. The system operates by cycling the compressor through the use of a thermostatic switch located on the evaporator. A POA valve is not used as the compressor clutch recycles to control refrigerant flow. An expansion tube takes the place of the formerly used expansion valve.

Full control of the system is maintained through use of two horizontally sliding levers plus a four-speed fan switch. The upper sliding lever makes use of vacuum supply and electrical switches to operate the air inlet, diverter and defrost doors, to control compressor operation and to provide "HI" blower speed when in "MAX A/C" position. There are no bowden cables connected to this lever. The lower lever (temperature control) uses a bowden cable to position the temperature door in the selector duet.

The blower motor runs continuously whenever the ignition switch is turned on. Fan speed may be controlled by the blower speed switch on the control panel even though the selector lever is in the "OFF" position.