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HOMESERVICE MANUALSAUDI2012A4 2.0T AVANT QUATTROREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHEATING, VENTILATION & AIR CONDITIONING (AVANT)87 AIR CONDITIONINGDESCRIPTION AND OPERATIONA/C UNIT AND AIR INTAKE HOUSING COMPONENTS, COMFORT CLIMATE CONTROL SYSTEM
2012 Audi A4 2.0T Avant Quattro

A/C Unit And Air Intake Housing Components, Comfort Climate Control System

2012 Audi A4 2.0T Avant QuattroSECTION A/C Unit And Air Intake Housing Components, Comfort Climate Control System
Fig 1: Identifying A/C Unit And Air Intake Housing Components, Comfort Climate Control System
GWWA87-10445Courtesy of AUDI OF AMERICA, LLC
  1. Air Intake Housing
    • Removing and installing, refer to A/C UNIT AIR INTAKE HOUSING .
    • Disassembling and assembling, refer to A/C UNIT AIR INTAKE HOUSING .
    • There are different versions (with and without a connection for the glove compartment cooling).
    • Connection for the glove compartment cooling on the air intake manifold, refer to GLOVE COMPARTMENT COOLING TO AIR INTAKE MANIFOLD CONNECTION .
      NOTE:

      From 01.2008, A/C units which have an additional connection for the glove compartment cooling are being installed. On vehicles without glove compartment cooling, this connection is sealed with a plug.

  2. A/C With Evaporator (comfort A/C System)
    • May only be removed when refrigerant circuit has been removed; bring vehicle to a workshop that has the necessary tools and in which the work can be performed accordingly by qualified personnel. Refer to General Information .
    • Evaporator with the A/C installed, removing and installing, refer to EVAPORATOR, A/C UNIT INSTALLED .
    • A/C unit with evaporator, removing and installing, refer to A/C UNIT .
    • Heating and A/C unit, disassembling and assembling, refer to A/C UNIT .
    • Clean air conditioning system evaporator with Ultrasound A/C Cleaner VAS 6189A, refer to A/C SYSTEM EVAPORATOR, CLEANING .
  3. Recirculation Door Motor -V113-
  4. Airflow Door Motor -V71-
  5. Coolant Pipes To Heater Core
  6. Expansion Valve
  7. Grommet
    • For sealing the opening through the plenum chamber rear wall for the refrigerant lines.
  8. Left Temperature Door Motor -V158-
  9. Cover For The Refrigerant Pipes Leading To The Evaporator
  10. Left Center Vent Motor -V110-
  11. Defroster Door Motor -V107-
  12. Left Footwell Door Motor -V108-
  13. Left Condensation Water Drain Connection, (Driver Side)
  14. Rear Temperature Door Motor -V137-
  15. Left Footwell Vent Temperature Sensor -G261-
    • Removing and installing, refer to LEFT FOOTWELL OUTLET AND VENT .
    • The left footwell vent temperature sensor is installed in the left footwell vent.
  16. Connection to the Climatronic Control Module -J255- on the A/C Wiring Harness.
  17. Right Footwell Vent Temperature Sensor -G262-
    • Removing and installing, refer to RIGHT FOOTWELL VENT G262 .
    • The right footwell vent temperature sensor is installed in the right footwell vent.
  18. Fresh Air Blower Control Module -J126-
  19. Evaporator
  20. Right Condensation Water Drain Connection (Passenger Side)
  21. Heat Exchanger For Heater Unit
  22. Auxiliary Air Heater Heating Element -Z35- / Honeycomb
    • The auxiliary air heater heating element is only installed on diesel vehicles.
    • Vehicles with gasoline engine (without auxiliary air heater heating element) have a honeycomb installed as a place holder (this assures that current conditions in the A/C with and without auxiliary air heater heating element are the same).
    • Auxiliary Air Heater Heating Element / Honeycomb with A/C system installed, removing and installing, refer to AUXILIARY AIR HEATER HEATING ELEMENT .
      NOTE:

      In MY 2009, as a running change, a new version of the auxiliary air heater heating element is being installed (the heating element is a bit more narrow); be sure to use the correct version and note the allocation as shown in the Electronic Parts Information.

  23. Right Temperature Door Motor -V159-
  24. Right Center Vent Motor -V111-
  25. Right Footwell Door Motor -V109-
  26. Fresh Air Blower -V2-
    • Removing and installing, refer to FRESH AIR BLOWER V2 
    • Check using Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
      NOTE:

      Different versions, refer to FRESH AIR BLOWER V2 .

  27. Dust and Pollen Filter
  28. Evaporator Vent Temperature Sensor -G263-
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.