Housing Assembly HVAC: Description and Operation

Automatic Air Conditioning Housing

Design, Illustrated in Fresh Air Mode:

Design, Illustrated in Recirculated Air Mode:

The automatic air conditioning housing serves to hold the following components
- Air guide flaps (1 to 9)
- Dust filter (10)
- Blower with blower control (11)
- Evaporator (12)
- Heater core (13)
- Expansion valve
- Vacuum elements
forming one complete unit.

The automatic air conditioning housing serves for distribution of the air required for ventilation of the vehicle to the appropriate air ducts and air outlets depending on the desired temperature in the passenger compartment.

The air guidance is dependent on various operating states such as:
- Normal operation
- Cooling mode
- Heating mode










Normal operation










Cooling mode










Heating mode