Audi A4: Refrigerant Circuit Components, Replacing
Audi A4 (B9) 2016-2026 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit Components, Replacing
- General Information
- Leaking or Damaged Components except A/C Compressor, Reservoir or Receiver/Dryer
- Compressor, Replacing without the Need for Flushing Refrigerant Circuit
- Compressor, Replacing on Account of Leakage or Internal Damage
- Receiver/Dryer or Accumulator and Restrictor, Replacing after Cleaning Refrigerant Circuit
- A/C Compressor Regulator Valve -N280-, Removing and Installing
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General Information
Vehicles with a High Voltage System (Hybrid Vehicles)
Extremely Dangerous Due to High-Voltage
The high-voltage system is under high-voltage. Death or serious
bodily injury by electric shock.
- I
Leaking or Damaged Components except A/C Compressor, Reservoir or
Receiver/Dryer
The refrigerant circuit was completely empty (for example
with larger leak or cracked hose)
Note
In the event of only a minor leak with slow escape of
refrigerant (e.g. at a small leakage
Compressor, Replacing without the Need for Flushing Refrigerant Circuit
Note
Cleaning the refrigerant circuit means flushing with
refrigerant R134a. Refer to
→ Chapter "Refrigerant Circuit, Cleaning (Flushing), with
Refrigerant R134a".
If a faulty A/C
SEE MORE:
Front Lid
Overview - Front Lid
Overview - Hood
1 -
Adjusting Buffer
Adjusting. Refer to
→ Chapter "Height, Adjusting using Adjusting Buffer".
2 -
Striker
Removing and installing. Refer to
→ Chapter "Striker, Removing and Installing".
Adjusting. Refer to
→ Chap
Connection for External Multimedia Devices
Overview - Connection for External Multimedia Devices
There are several External Audio Source Connection -R199-
versions:
USB Charging - AUX IN, UE4
AMI (Audi music interface) - USB connection (quantity 2) -
AUX IN/ASI, UI2/UE7
"USB charge" and
"USB connection" are in the USB
Connection Basep
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