Evaporator Housing

Evaporator Housing

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.

• Attachments, removing from heating & A/C unit and re-installing, refer to => [ Attachments ] Attachments.

• Heating and A/C unit, disassembling and assembling, refer to => [ Front Heating & A/C Unit ] Front Heating & A/C Unit.

- Remove air intake housing from heating & A/C unit, refer to => [ Front Heating & A/C Unit ] Front Heating & A/C Unit.

- Remove air distribution housing with wiring harness from evaporator housing, refer to => [ Front Heating & A/C Unit ] Front Heating & A/C Unit.

Evaporator housing (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 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 Foam Seal

• For seal at plenum chamber rear wall with heating & A/C unit installed.

2 Screw

• Tightening specification 10 Nm

• Removing and installing, refer to => [ Front Expansion Valve ] Front Expansion Valve.

3 Expansion Valve

• There are different versions. For the correct allocation refer to the Electronic Parts Catalog.

• Removing and installing, refer to => [ Front Expansion Valve ] Front Expansion Valve.

• Checking function, refer to => [ Test Requirements ] Test Requirements.

4 O-ring Seal

• Replace per Electronic Parts Catalog.

• Lubricate lightly with refrigerant oil before installing, refer to => [ Refrigerant Circuit O-Rings ] Refrigerant Circuit O-Rings.

5 O-ring Seal

• Replace per Electronic Parts Catalog.

• Lubricate lightly with refrigerant oil before installing, refer to => [ Refrigerant Circuit O-Rings ] Refrigerant Circuit O-Rings.

6 Retaining Plate

• For expansion valve, refer to => [ Front Expansion Valve ] Front Expansion Valve.

7 Foam Seal

• For seal of evaporator refrigerant pipes on evaporator housing.

8 Evaporator

• With foam seal, check before installing.

• Insert evaporator into lower section of evaporator housing.

9 Seal

• For sealing connection between evaporator housing and air intake housing.

10 Lower Section Of Evaporator Housing

• Different versions on vehicles with and without the Auxiliary Air Heater Heating Element (Z35). Refer to Electronic Parts Catalog.

• 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.

11 Bonded Rubber Element

• Inserted and engaged in evaporator housing.

• Check for secure fit in heating & A/C unit, glue in loose bonded rubber element if necessary.

12 Air Guide

13 Upper Section Of Evaporator Housing

• 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 evaporator housing upper section 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.

14 Clips

15 Screw

Checking Foam Seal On Evaporator

- Check the applied foam seals - B - to - D - for damage and proper bonding before inserting evaporator.






- Place seal - A - (for seal of both evaporator refrigerant lines on evaporator housing) on to evaporator pipes.

Inserting Evaporator Into Lower Section Of Evaporator Housing

- Insert evaporator - A - first into evaporator housing according to the illustration, pay attention to perimeter seal - arrows - while doing this.