Peugeot 405 Manual

Heating and ventilation system - general information
Cooling, heating and ventilation systems / Heating and ventilation system - general information

1 The heating/ventilation system consists of a blower motor (housed behind the facia), face level vents in the centre and at each end of the facia, and air ducts to the front footwells.

2 Two types of system are fitted to the model range. On basic specification models, the heating/ventilation system is manuallycontrolled.

On higher specification models, the system is electronically-controlled. The components of both systems are identical, with the exception of the control unit.

Additionally, on models with the electronically- controlled system, temperature sensors and a thermostat are fitted to automatically control the temperature of the air inside the vehicle according to the position of the temperature control knob.

3 The control unit is located in the facia, and the controls operate flap valves to deflect and mix the air flowing through the various parts of the heating/ventilation system. The flap valves are contained in the air distribution housing, which acts as a central distribution unit, passing air to the various ducts and vents.

4 Cold air enters the system through the grille at the rear of the engine compartment. If required, the airflow is boosted by the blower, and then flows through the various ducts, according to the settings of the controls. Stale air is expelled through ducts at the rear of the vehicle. If warm air is required, the cold air is passed over the heater matrix, which is heated by the engine coolant.

5 A recirculation switch enables the outside air supply to be closed off, while the air inside the vehicle is recirculated. This can be useful to prevent unpleasant odours entering from outside the vehicle, but should only be used briefly, as the recirculated air inside the vehicle will soon become stale.

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