3 push knobs
- The A/C push knob
- Controls the A/C.
- Turns the A/C ON when the push knob is pressed and the indicator lamp is illuminated. (The rotary blower control knob must be in one of its 4 positions for the A/C to function.
- The rear window defogger push knob
- Controls the rear window defogger.
- Turns ON the rear window defogger when the push knob is pressed and the indicator lamp is illuminated.
- The fresh air control push knob
- Switches between recirculating passenger compartment air or bringing outside air into the passenger compartment.
- Defaults to fresh air mode. The indicator lamp is illuminated when recirculation is selected.
- Operates the inlet air door by electrical motor.
The electric engine cooling fans are operational any time the A/C control is ON. This added feature is part of the A/C controller function and is aimed at preventing excessive compressor head temperatures. It also allows the A/C system to function more efficiently. The operation of the cooling fans is controlled by the engine control module (ECM) through the cooling fan relays.