Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
- Heating and ventilation
   Heating and ventilation check
   Heater fan
   Replacement of the dustproof filter
   Heating and ventilation drive
   List of malfunctions
+ body Elements
+ Search of malfunctions
+ Specifications

Heating and ventilation drive

All functions of system of heating and salon ventilation in the Audi 80 car can be operated from the block located on the dashboard.

Bowden's three so-called cables pass from there to the case of an air line which is often called by "an air line box». In this case the air valves directing a stream of air in the necessary direction are located.

At the left: the rotary regulator (2) fans of salon is rigidly connected with the control unit and a drive of system of heating and ventilation (1). At malfunction it is necessary to replace all knot completely.

On the right: removal of a cable of Bowden at the block of a drive of system of heating and salon ventilation: to pull out pincers a countersupport (1), to disconnect the end of a cable (2) from the lever (3).

Replacement of hummock drives


  1. Removal and installation are identical practically at all hummock drives.
  2. To remove a shelf at the left under the dashboard (section Salon).
  3. To remove radio.
  4. If necessary to remove a ware box.
  5. To remove all three handles of rotary switches of heating/ventilation.
  6. To weaken two screws with the crosswise shliyets, located below.
  7. To remove the panel.
  8. To turn out four bolts visible now with a cross-shaped shliyets.
  9. Now it is possible to extend a little from the dashboard the control unit heating and salon ventilation, so, to get before fastenings of cables of Bowden.
  10. By means of a screw-driver to wring out a countersupport of a cable of a drive from a latch on the drive block.
  11. The end of a cable is bent in the form of a loop and leaky inserted into the drive lever.
  12. On a box of an air line of a cover of cables of Bowden are rigidly screwed on eyes or are fixed by plastic latches.
  13. To turn out screws or to squeeze latches and to remove clips.

Removal of ventilating lattices

If for rotary directing air in the ventilating channel the leaf was hooked:


  1. To hook a ventilating lattice a screw-driver above and below and carefully to take out it.
  2. At installation to pay attention: the top rotary hinge is thicker.