||The electronic control is connected to the sensors and actuators by a multi-plug, and through wiring to the main vehicle wiring harness.
|Ambient air temperature sensor
||The cabin air temperature is continually measured by the cabin air temperature sensor. When the cabin air temperature has been changed to be within 2°C or 35°F of the desired selection, the fan speed is gradually reduced.
||Vacuum servos consist of a sealed housing divided by a flexible diaphragm. The diaphragm seals the housing into two separate chambers.
|Electric servo motors
||Electrical servos incorporate limit switches to open circuit the current supply to the motor when the maximum travel of the flap or tap has been reached.
|Automatic climate control sensors
||Most temperature sensors used in climate control systems are thermistors which are solid state electronic devices that change their electrical resistance in response to temperature changes.
|Evaporator temperature sensor
||The evaporator temperature sensor is located in the air stream where the air leaves the evaporator and signals to the control unit the temperature of the air.
|Blower speed control
||This controls the speed of the fan in the heating and air-conditioning system in the passenger cabin.
|Ventilation systems||A ventilation system is fitted to vehicles to make the environment in the cabin comfortable for its occupants. The ventilation system is controlled by a set of switches located on the dash.|