Audi A4: Refrigerant Circuit General Information
Audi A4 (B9) 2016-2026 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit General Information
- Vehicles with a High Voltage System (Hybrid Vehicles)
- Refrigerant Circuit Components Allocation, High and Low Pressure Sides
- Refrigerant Circuit
- Connections for Quick-Release Coupling on Refrigerant Circuit
- Switches and Sensors on Refrigerant Circuit and Connections
- Refrigerant Circuit Pressures and Temperatures
- Pressure Gauge, Tests and Measurements
- Service and Recycling Units
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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.
- Individuals with electronic/medical life- and health su
General Information
High pressure side are the condenser, receiver/dryer and
restrictor or expansion valve to separate the high and low
pressure liquid ends.
High pressure results from the restrictor or expansion valve
SEE MORE:
Window Guide, Removing and Installing
Removing
- Remove the window frame trim panel. Refer to
→ Body Interior; Rep. Gr.70; Rear Door Trim Panels; Window Frame
Trim Panel, Removing and Installing.
- Remove the B-pillar trim. Refer to
→ Chapter "B-Pillar Door Trim, Removing and Installing, Rear".
-
Seat Heating Element, Removing and Installing
Removing
- Separate the cover and cushion. Refer to
→ Chapter "Cover and Cushion, Separating, Bench Seat".
- Disconnect the wire -3- directly
from the old heating element -1-.
Note
The old heating elements remain on the cushion and will be
covered over by the new heating
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