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

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. 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-, EMOVING 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-, EMOVING 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-, EMOVING 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