LeSabre V6-231 3.8L VIN 3 SFI (1988)
Control Assembly: Description and Operation
A/C Control Assembly Faceplate
System Operation
DESCRIPTION
The electronic A/C control assembly has soft-touch switches for selecting operating mode(s) and the desired in-car (set) temperature. LED indicators
light to show which modes have been selected, and a Vacuum-fluorescent (VF) display shows the outside air temperature (when selected), the set
temperature, or a diagnostic code, which can identify a fault within the system.
OPERATION
The control assembly contains a microprocessor which receives signal information from sources such as the control panel switches, temperature
sensors, and the temperature valve feedback potentiometer in the programmer. In turn, the microprocessor sends command signals to the programmer
to position the air valves and to the blower motor control module to control the blower speed. This enables the system to maintain a set in-car
temperature of 65°F to 85°F.
