Front HVAC Unit

Front HVAC Unit

• When removing retaining plates, mark the various control motors (risk of interchange with other control motors, control motors are currently identical in construction, the difference lies in the levers which operate the doors. Refer to Electronic Parts Catalog).

• If control motors are interchanged, these control motors with the incorrect installation locations do not reach their specified end position, and the malfunction "upper or lower limit exceeded" may be displayed in DTC memory after basic setting.

• When removing, mark the various connectors to the control motors (risk of interchange with connectors and control motors of identical construction). Various connectors of identical construction are present on wiring harness of heating & A/C unit, apply identifying marks on connectors before disconnecting (risk of interchange) Refer to Electronic Parts Catalog.

• Apply a small amount of Grease (G 000 150) to the connecting element guides, as well as the pins and toothed segments on the door levers. Refer to Electronic Parts Catalog.

• The A/C unit may only be removed when the refrigerant circuit has been discharged. Bring the vehicle to a workshop that has the necessary tools and where the work can be performed by qualified personnel.

• The heating & A/C unit is available in different versions (Basic and Comfort), therefore note the exact assignment of the various components.

• 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. Loosen the line connections on vehicles with an auxiliary heater heating element, refer to => [ Auxiliary Heater Heating Element ] Service and Repair.

• Heating & A/C unit, removing and installing, refer to => [ Front HVAC Unit ] Front HVAC Unit.

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

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

• Air distribution housing of front heating & A/C unit, disassembling and assembling, refer to => [ Air distribution Housing ] Air distribution Housing.

• Evaporator housing of front heating & A/C unit, disassembling and assembling, refer to => [ Evaporator Housing ] Evaporator Housing.