Air Conditioner Control: Description

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

The front air control provides regulation of the vehicle's interior temperature. The system is based on the position of the front air controls temperature switch selected by the driver. This is done by utilizing a microcomputer, also referred to as the front air control, which receives input signals from the following three sensors:

Ambient sensor
Intake sensor
PBR (Position Balanced Resistor).
The front air control uses these signals (including the set position of the temperature switch) to control:
Outlet air volume
Air temperature
Air distribution
The front air control also provides separate regulation of the vehicle's interior temperature for the rear passenger area. The system is based on the temperature and rear blower settings selected from rear control switches located on the front air control, or from the temperature and rear blower settings selected from rear control switches on the rear air control, when the front air control switches are set to the rear position

The front air control is used to select:
Outlet air volume
Air temperature/distribution