Overview - Expansion Valve And Refrigerant Lines To Rear Heater And A/C Unit, Pr Number 9AH/ 9AQ
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 Expansion Valve And Refrigerant Lines To The Rear Heater And A/C Unit, Vehicles With "High A/C System"
- Pass-Through for the Refrigerant Lines in the Vehicle Interior
- To evaporator in rear heater and A/C unit
- Removing and Installing. Refer to HEATER AND A/C UNIT, REMOVING AND INSTALLING, "High" A/C SYSTEM, PR NUMBER 9AH/ 9AQ .
- Nut
- To the threaded pin on the refrigerant line bracket on the evaporator in the rear heater and A/C unit
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Refrigerant Line - Low Pressure Side
- On the underbody in the area of the center tunnel
- From the refrigerant line opening in the vehicle interior to the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Refrigerant Line - Low Pressure Side
- On the underbody in the area of the center tunnel
- From the expansion valve to the refrigerant line opening in the vehicle interior
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Retaining Plate
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Bolt
- Quantity: 2
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Nut
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- 9 Nm
- Rear Expansion Valve
- There are different versions. Refer to the Parts Information.
- Refrigerant Line, Disconnecting and Connecting. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM REAR EXPANSION VALVE TO EVAPORATOR IN REAR HEATER AND A/C UNIT .
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
- Bracket
- For the refrigerant lines on the underbody
- Refrigerant Line - Low Pressure Side
- On the underbody
- From the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Nut
- 2 Nm
- Refrigerant Line - High Pressure Side
- On the underbody
- To the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Nut
- Quantity: 2
- 4 Nm
- Bracket
- For the refrigerant lines on the underbody
- Bolt
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Bracket
- For the refrigerant lines on the underbody
- Nut
- Quantity: 2
- 4.5 Nm
- Bolt
- 9 Nm
- Refrigerant Line - Low Pressure Side
- On the underbody and under the left fender
- To the opening in the plenum chamber
- Removing and installing from the pass-through in the plenum chamber. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Bolt
- 9 Nm
- Refrigerant Line - High Pressure Side
- On the underbody and under the left fender
- From the opening in the plenum chamber
- Removing and installing from the pass-through in the plenum chamber. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- Removing and Installing. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Pass-Through for Refrigerant Lines in the Plenum Chamber
- There are different versions. Refer to the Parts Information.
- This illustration shows the version for vehicles with a second evaporator (with a "High" A/C system)
- Removing and Installing. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .