Overview - Heater And A/C Unit

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Overview - Heater and A/C Unit, Heater Core and Auxiliary Heater Heating Element

Fig 1: Exploded View Of Heater & A/C Unit, Heater Core, Auxiliary Heater Heating Element

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 2 Nm
- Always replace
Coolant Pipe for Heater Core
- There are different versions. Refer to the Parts Information.
- Coolant Supply from Engine
- Removing and Installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
Clip
- Always replace
Coolant Pipe for Heater Core
- There are different versions. Refer to the Parts Information.
- Coolant Return to Engine
- Removing and Installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
O-Ring
- There are different versions. Refer to the Parts Information.
- Replacing. Refer to HEATER CORE, REMOVING AND INSTALLING .
Cover
- For the heater core
Bolt
- 2 Nm
Foam Spacer
- For sealing/insulating
- Note the installation position
Bracket
- For coolant pipes
Foam
- For insulating
- Note the installation position
Heater and A/C Unit
- The opening for the auxiliary heater is sealed on vehicles without an Auxiliary Heater Heating Element -Z35-
- Removing and Installing. Refer to HEATER AND A/C UNIT, REMOVING AND INSTALLING .
- Disassembling and assembling. Refer to HEATER AND A/C UNIT, DISASSEMBLING AND ASSEMBLING .
Heater Core
- There are different versions. Refer to the Parts Information.
- Removing and Installing. Refer to HEATER CORE, REMOVING AND INSTALLING .
Auxiliary Heater Heating Element -Z35-
- Removing and Installing. Refer to Auxiliary Heater Heating Element -Z35-, REMOVING AND INSTALLING .
Bolt
- 2 Nm
- Quantity: 2
Wire
- For Auxiliary Heater Heating Element -Z35-
- Removing and Installing. Refer to Auxiliary Heater Heating Element -Z35-, REMOVING AND INSTALLING .
Ground Wire
- Nut 9 Nm
- For the auxiliary heater
Bolt
- 2 Nm
- Quantity: 3
Screw-Type Clamp
- Always replace
O-Ring
- There are different versions. Refer to the Parts Information.
- Replacing. Refer to HEATER CORE, REMOVING AND INSTALLING .