Front Heating & A/C Unit
Front Heating & A/C Unit
Refer to => [ Front HVAC Unit ] Front HVAC Unit for notes on disassembly.
• Heating and A/C unit, removing and installing, refer to => [ Front HVAC Unit ] Front HVAC Unit.
• Removing and installing attachments, refer to => [ Attachments ] Attachments.
Front A/C unit (without and with auxiliary heater heating element (Z35) )
• Starting with MY 2009, certain vehicles with a 6 cylinder TDI engine without an auxiliary heater have an Auxiliary Heater Heating Element (Z35) installed depending on the emissions standard (running change depending on the engine). Refer to Audi Sales Program. Pay attention to the different components on versions with and without an auxiliary heater heating element, refer to => [ Auxiliary Heater Heating Element ] Service and Repair and Electronic Parts Catalog.
1 Air Intake Housing
• Do not disassemble further.
• As of 11.2007, the Comfort A/C system as an updated Fresh Air Blower Control Module (J126) (an updated Comfort Climatronic control module (J255) and an updated Fresh Air Blower (V2) ). An updated air intake housing is also being used. Make sure to use the correct allocation for these parts with each other. Refer to => [ Fresh Air Blower Control Module (J126) ] Fresh Air Blower Control Module (J126) and to the Electronic Parts Catalog.
2 Screw
3 Dust and Pollen Filter (With Activated Charcoal Filter Element)
• Follow the replacement intervals.
• With an activated charcoal filter element. Refer to Electronic Parts Catalog.
• Removing and installing, refer to => [ Dust and Pollen Filter ] .
• An Air Quality Sensor (G238) is also installed on vehicles with a Comfort version Climatronic Control Module (J255).
4 Dust and Pollen Filter Shaft Cover
• Located in vehicle behind footwell lining in front passenger's footwell (below on heating & A/C unit).
• Removing and installing, refer to => [ Dust and Pollen Filter ] .
5 Cover For Right Heater Core
• Removing and installing, refer to => [ Right Heater Core Covers - Heating & A/C Unit Installed ] Right Heater Core Covers - Heating & A/C Unit Installed.
6 Cover For Heater Core At Bottom
• Cover is removed and installed with the heater core.
• Remove and install with the A/C unit installed, refer to => [ Heater Core, Heating & A/C Unit Installed ] Heater Core, Heating & A/C Unit Installed.
• Remove and install with the A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
7 Retaining Pin For Cover For Heater Core At Bottom
• Removing and installing for example, with heating & A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
8 Cover For Left Heater Core
• Removing and installing, refer to => [ Left Heater Core Covers - Heating & A/C Unit Installed ] Left Heater Core Covers - Heating & A/C Unit Installed.
9 Heater Core
• Remove and install heater core together with cover.
• Remove and install with the A/C unit installed, refer to => [ Heater Core, Heating & A/C Unit Installed ] Heater Core, Heating & A/C Unit Installed.
• Remove and install with the A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
10 Retaining Clip For Coolant Pipes
• Removing and installing for example, with heating & A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
• Replace per Electronic Parts Catalog.
11 Coolant Pipe To Heater Core
• Removing and installing for example, with heating & A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
• Supply from engine (via pipe group under left fender), refer to=> [ Incorporation of Front HVAC System into Cooling Circuit ] Incorporation of Front HVAC System Into Cooling Circuit.
12 Coolant Pipe To Heater Core
• Removing and installing for example, with heating & A/C unit removed, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
• Return to engine (via pipe group under left fender), refer to => [ Incorporation of Front HVAC System into Cooling Circuit ] Incorporation of Front HVAC System Into Cooling Circuit.
13 O-ring
• Removing and installing, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
• Replace per Electronic Parts Catalog.
14 Base Plate With Foam Seal
• Removing and installing, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
15 Grommet
• Pass-through of coolant pipes from passenger compartment into engine compartment.
• Check for correct installation position in plenum chamber front wall.
• Removing and installing, refer to => [ Heater Core, Heating & A/C Unit Removed ] Heater Core, Heating & A/C Unit Removed.
16 Evaporator Housing
• Different versions on vehicles with and without the Auxiliary Air Heater Heating Element (Z35). Refer to Electronic Parts Catalog.
• Disassembling and assembling, refer to => [ Evaporator Housing ] Evaporator Housing.
• Starting with MY 2009, certain vehicles with a 6 cylinder TDI engine without an auxiliary heater, have an Auxiliary Air Heater Heating Element (Z35) installed depending on the emissions standard (running change depending on the engine). Refer to the Audi Sales Program.
• Different components on versions with and without an auxiliary heater heating element, refer to => [ Auxiliary Heater Heating Element ] Service and Repair and Electronic Parts Catalog.
17 Air Distribution Housing
• Disassembling and assembling, refer to => [ Air distribution Housing ] Air distribution Housing.
• Different versions (Basic and Comfort), refer to Electronic Parts Catalog.
• Air duct and doors in air distribution housing, refer to => [ Air Duct In Front Heating & A/C Unit ] Air Duct In Front Heating & A/C Unit.
18 Threaded Plate
• For mounting retaining plates with control motors to air distribution housing.