Control Assembly: Description and Operation

Fig 29 Heater-A/C Control Bezel And Accessories Removal/Installation:

HEATER AND AIR CONDITIONER CONTROLS
Both the heater and heater-A/C systems use a combination of mechanical, electrical, and vacuum controls. These controls provide the vehicle operator with a number of setting options to help control the climate and comfort within the vehicle. Refer to the owner's manual for more information on the suggested operation and use of these controls.

The heater-only or heater-A/C control panel is located in the instrument panel heater-A/C control bezel, inboard of the steering column. The control panel contains a sliding-type temperature control lever, a push button type mode control switch (four-button for heater-only, six-button for heater-A/C), and a toggle-type blower motor switch.

Models with the rear heater or rear heater-A/C option have an additional vacuum switch on the back of the heater-A/C control. This vacuum switch is used to control the auxiliary water valve, and the flow of engine coolant to the rear heater core. When the temperature control lever is moved from the far left or Cool position at least one-half inch or more toward the right or Warm position, the auxiliary water valve is opened.

Models with the rear heater or heater-A/C option also have a toggle-type rear blower motor switch mounted in the heater-A/C control bezel below the heater-A/C control panel. This switch controls the rear blower motor speed.