Overview - Front Heater And A/C Unit Attachments, Air Distribution Housing, Heat EXCHANGER, Etc.

Courtesy of AUDI OF AMERICA, LLC

1. Insulation
   • Between the air duct in the air distribution housing and the one in the resonator chamber in the air intake manifold.
2. Evaporator Housing
   • With the evaporator installed by the manufacturer
   • There are different versions of the evaporator from the manufacturer and the replacement evaporator. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, REMOVING AND INSTALLING .
   • Depending on the version disassembling further may not be required. Refer to OVERVIEW - EVAPORATOR HOUSING .
   • Evaporator, Removing and installing. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, REMOVING AND INSTALLING .
   • Refer to HEATER AND A/C UNIT, REMOVING AND INSTALLING 
3. Evaporator Vent Temperature Sensor -G263-
   • Removing and installing. Refer to Evaporator Vent Temperature Sensor -G263-, REMOVING AND INSTALLING .
4. Plug
   • Plugs for example 8D0 819 598. Refer to the Parts Information.
   • Only present on a heater and A/C unit, on which cleaning of the evaporator has taken place. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, CLEANING WITH Suction Feed Spray Gun .
5. Cap
   • For the connection to the glove compartment cooling
   • Not present on the glove compartment cooling
6. Catch
   • Open carefully
7. Heater Core for the Heater
   • Removing and installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
   • Check the glued-on foam seals for damage and proper bonding. Refer to HEATER CORE, REMOVING AND INSTALLING .
8. Screw
   • 1 Nm
9. Heat Exchanger Cover
   • For vehicles without an Auxiliary Heater Control Module -J604-. Refer to the Parts Information.
   • There are different versions. Refer to the Parts Information.
   • Removing and installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
10. Heat Exchanger Cover
    • For vehicles with an Auxiliary Heater Control Module -J604-. Refer to the Parts Information.
    • There are different versions. Refer to the Parts Information.
    • Removing and installing. Refer to HEATER CORE, REMOVING AND INSTALLING  and Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING .
11. Auxiliary Heater Control Module -J604- with Auxiliary Heater Heating Element -Z35-
    • The Auxiliary Heater Control Module -J604- with the Auxiliary Heater Heating Element - Z35- is installed on vehicles with Diesel engines. Refer to ELECTRIC AUXILIARY HEATER TEST (Auxiliary Heater Control Module -J604- WITH Auxiliary Heater Heating Element -Z35-) .
    • The Auxiliary Heater Control Module -J604- (with Auxiliary Heater Heating Element -Z35-) is currently not installed on vehicles with a high-voltage system. The High-Voltage Heater (PTC) -Z115- assumes this function on these vehicles.
    • If an optional parking heater is activated as an auxiliary heater in vehicles with a diesel engine, no Auxiliary Heater Control Module -J604- and thus also no Auxiliary Heater Heating Element -Z35- are installed. Refer to ELECTRIC AUXILIARY HEATER TEST (Auxiliary Heater Control Module -J604- WITH Auxiliary Heater Heating Element -Z35-) .
    • Check the function of the Auxiliary Heater Control Module -J604- and the Auxiliary Heater Heating Element -Z35-. Refer to ELECTRIC AUXILIARY HEATER TEST (Auxiliary Heater Control Module -J604- WITH Auxiliary Heater Heating Element -Z35-) .
    • Auxiliary Heater Control Module -J604- with Auxiliary Heater Heating Element -Z35-, Removing and installing. Refer to Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING .
12. Zone Partition Grille
    • For vehicles without an Auxiliary Heater Control Module -J604-. Refer to the Parts Information.
    • There are different versions. Refer to the Parts Information.
    • Removing and installing. Refer to HEATER CORE, REMOVING AND INSTALLING  and Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING .
13. Rubber Bushing
    • Mounted on the pins for the Auxiliary Heater Heating Element -Z35-. Refer to Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING 
14. Right Footwell Vent Temperature Sensor -G262-
    • Removing and installing. Refer to Right Footwell Vent Temperature Sensor -G262-, REMOVING AND INSTALLING .
    • Check the Right Footwell Vent Temperature Sensor -G262-. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.
15. Heater and A/C Unit Air Distribution Housing with Evaporator
    • Heater and A/C Unit with Evaporator, Removing and installing. Refer to HEATER AND A/C UNIT, REMOVING AND INSTALLING .
    • Air Distribution Housing Actuators, Removing and Installing at Heater and A/C Unit. Refer to OVERVIEW - FRONT ACTUATORS .
    • Evaporator, Removing and installing. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, REMOVING AND INSTALLING .
    • Air Intake Manifold, Removing and installing. Refer to OVERVIEW - HEATER AND A/C UNIT .
    • Front Heater and A/C Unit Wiring Harness. Refer to OVERVIEW - HEATER AND A/C UNIT .
16. Left Footwell Vent Temperature Sensor -G261-
    • Removing and installing. Refer to Left Footwell Vent Temperature Sensor -G261-, REMOVING AND INSTALLING .
    • Check the Left Footwell Vent Temperature Sensor -G261- using the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function.
17. Screw-Type Clamp
    • Replacing. Refer to the Parts Information.
    • Removing from the heater core and installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
18. Screw
    • 2 Nm
    • Removing from the heater core and installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
19. O-Ring Seal
    • Replacing. Refer to the Parts Information.
    • Coat lightly with coolant before installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
20. Coolant Pipe Spacer
    • Is clipped in on both coolant pipes
21. Coolant Pipe to Heater Core
    • Coolant return
    • Removing and installing on the heater core. Refer to HEATER CORE, REMOVING AND INSTALLING .
    • Can only be replaced when the heater and A/C unit is removed.
22. Coolant Pipe to Heater Core
    • Coolant supply
    • Removing and installing on the heater core. Refer to HEATER CORE, REMOVING AND INSTALLING .
    • Can only be replaced when the heater and A/C unit is removed.
23. Bracket for Coolant Pipes