For 1990-2009 cars

The electronic A/C system consists of the following 4 major systems:

• | The refrigeration system

• | The heater system

• | The air distribution system

• | The mode/temperature control system

The driver may select the following functions from the system control panel:

• | The desired interior temperature (the SET temperature)

• | The fan speed

• | The mode of operation

One of these modes is a fully automatic mode in which the system determines the following conditions:

• | The appropriate air intake location

• | The appropriate air discharge location

• | The fan speed

• | The discharge air temperature according to the driver-selected temperature

| The system's network of sensors also provides this information.

The Oldsmobile electronic A/C system uses a cycling clutch orifice tube (CCOT) type refrigeration system. A variable displacement orifice tube (VDOT) type refrigeration system is used with the Buick.