Audi A4: Refrigerant Circuit
Audi A4 (B9) 2016-2025 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit
- A/C System Repair Information
- Using Service Station
- Refrigerant Circuit, Flushing with Compressed Air and Nitrogen
- Refrigerant Circuit, Cleaning (Flushing), with Refrigerant R134a
- Refrigerant Circuit, Determining Leaks
READ NEXT:
A/C System Repair Information
Air conditioning systems designed for refrigerant R12 are
only to be filled with refrigerant R134a if certain requirements
are fulfilled. Refer to
→ Chapter "Refrigerant Circuit, Convertin
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
SEE MORE:
Windshield Antenna Suppression Filter -C18-, Removing and Installing
Windshield Antenna Suppression Filter -C18-, Removing and Installing,
Sedan
The Windshield Antenna Suppression Filter -C18- is located
behind the left D-pillar trim panel at the center of the
D-pillar.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key
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
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