Function, individual components · 1. Heating/air-conditioning unit 1.2 Blower outlet sensor

911 Carrera (996) Heating diagnosis Function, individual components 1. Heating/air-conditioning unit 1.2 Blower outlet sensor The heatingjair-conditioningunitincludes: The blower outlet sensor measures the temperature of air emerging Heat exchanger (to heat the air) into the footwell. Temperature mixing valve 2. Heating! air-conditioning control (to control the interior temperature) Central valve (to control the air flow) The heatingjair-conditioningcontrol includes the closed and open-loopcontrol electronics, Outside air / recirculation valve as well as switches for manualinfluence (to compensate for the dynamic pressure, on automatic program control. or recirculation control) The heatingjair-{:onditioningcontrol regulates Fresh-airblower the different valves according to the set temperature, the interior temperature, Outside sensor the outside temperature, the vehicle (to measure the intake air temperature) speed and the intensity of sunlight shining into the vehicle. Blower outlet sensor (to measure the footwell temperature) 3. Interior sensor Driver (to control the fresh-air blower speed) The interior sensor measuresthe temperature of the passengercompartment. Evaporator (to cool the air) 4. Sun sensor Expansionvalve The outside air is heated or cooled in Thesunsensormeasuresthe intensity the heating/air-conditioningunit and of sunlightshininginto the vehicle. distributed to the air vents. 1.1 Outside sensor The outside sensor measuresthe temperature of the incoming air. 80 01 Diagnosis/troubleshooting, heating 80 -D 7 Printed in Germany -11. 1998 99680Dl