Seville STS V8-4.6L VIN 9 (1998)
Control Module HVAC: Description and Operation
Air Conditioning Programmer (ACM)
The programmer is used to control the operation of the HVA0 system. The programmer is contained within the heater and A/C control assembly. The
heater and A/C control assembly allows the vehicle operator to communicate with the programmer or Instrument Panel Integration Module (IPM). The
IPM is the component which monitors the HVAC system status and can adjust to meet the requirement set by the operator of the vehicle. The heater and
A/C control includes buttons to select operating modes, a fan speed increase/decrease switch, the rear defog control button, and a vacuum fluorescent
display panel. When the parklamps or headlamps are turned on, the buttons are illuminated. The temperature for the driver and passenger is controlled
individually by two separate knobs.
