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:
Coolant Pump/Coolant Thermostat
Overview - Coolant Pump/Coolant Thermostat
1 - Connection
2 - O-ring
Installation instructions. Refer to
→ Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant
Pump/Coolant Regulation; Overview - Coolant Pump/Coolant Regulation.
3 - Cen
Overview - Antenna Systems
Overview - Antenna Systems, Sedan, USA
The antenna systems consist of window antennas, a Roof
Antenna - R216- and bumper antennas.
Window Antennas
Antenna -R11- (AM/FM1)/TV Antenna 1 -R55- (TV1) to the
Antenna Amplifier -R24- at the top of the right D-pillar
TV Antenna 2 -R56- (TV2) to the TV A
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