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

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Front Heater And A/C Unit Attachments, Air Distribution Housing, Heat Exchanger

Courtesy of AUDI OF AMERICA, LLC

Insulation
- RHD: is a mirror image
- Between the air duct in the air distribution housing and the one in the resonator chamber in the air intake housing.
Evaporator Housing
- RHD: is a mirror image
- With the evaporator installed by the manufacturer
- There are different versions of the evaporator from the manufacturer and the replacement evaporator. Refer to the Parts Information.
- Depending on the version, further removal may not be necessary. Refer to OVERVIEW - EVAPORATOR HOUSING .
- Removing and installing the evaporator. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, REMOVING AND INSTALLING .
- Removing and Installing. Refer to FRONT HEATER AND A/C UNIT EVAPORATOR HOUSING, REMOVING AND INSTALLING .
Evaporator Vent Temperature Sensor -G263-
- On RHD vehicles, the Evaporator Vent Temperature Sensor -G263- is installed from the left side into the evaporator housing of the heater and A/C unit (in the area behind the coolant pipes for the heat exchanger).
- Removing and Installing. Refer to Evaporator Vent Temperature Sensor -G263-, REMOVING AND INSTALLING .
Plug
- Refer to the Parts Information for the plugs.
- Only present on a heater and A/C unit, on which cleaning of the evaporator has taken place.
Cap
- For the connection to the glove compartment cooling
- Not present on glove compartment cooling
Catch
- Open carefully
Heater Core for the Heater
- Check the glued-on foam seals for damage and proper bonding
- Removing and Installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
Bolt
- 1 Nm
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, PREPARING FOR REMOVAL .
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, PREPARING FOR REMOVAL and Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING .
Auxiliary Heater Control Module -J604- with Auxiliary Heater Heating Element -Z35-
- Installed depending on the equipment and engine
- Removing and Installing. Refer to Auxiliary Heater Control Module -J604- (WITH Auxiliary Heater Heating Element -Z35-), REMOVING AND INSTALLING .
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, PREPARING FOR REMOVAL .
Rubber Bushing
- Mounted on the pins for the Auxiliary Heater Heating Element -Z35-
Right Footwell Vent Temperature Sensor -G262-
- Check the Right Footwell Vent Temperature Sensor -G262-. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
- Removing and Installing. Refer to Right Footwell Vent Temperature Sensor -G262-, REMOVING AND INSTALLING .
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 .
- Removing and installing the evaporator. Refer to EVAPORATOR IN FRONT HEATER AND A/C UNIT, REMOVING AND INSTALLING .
- Removing and installing the air intake housing. Refer to AIR INTAKE HOUSING FROM HEATER AND A/C UNIT, REMOVING AND INSTALLING .
Left Footwell Vent Temperature Sensor -G261-
- Check the Left Footwell Vent Temperature Sensor -G261- using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
- Removing and Installing. Refer to Left Footwell Vent Temperature Sensor -G261-, REMOVING AND INSTALLING .
Screw-Type Clamp
- Replace after removing
- Removing and installing on the heater core. Refer to HEATER CORE, REMOVING AND INSTALLING .
Bolt
- Removing and Installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
- 2 Nm
O-Ring
- Replace after removing
- Coat lightly with coolant before installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
Coolant Pipe Spacer
- Is clipped in on both coolant pipes
- Depending on vehicle equipment
Coolant Pipe to Heater Core
- Coolant return
- The coolant pipe can be replaced only with the heater and A/C unit removed
- Removing and installing on the heater core. Refer to HEATER CORE, REMOVING AND INSTALLING .
Coolant Pipe to Heater Core
- Coolant supply
- The coolant pipe can be replaced only with the heater and A/C unit removed
- Removing and installing on the heater core. Refer to HEATER CORE, REMOVING AND INSTALLING .
Bracket for Coolant Pipes