Audi A4: A/C System, General Information
Audi A4 (B9) 2016-2025 Service Manual / Heating, Ventilation & Air Conditioning / A/C System, General Information
- Introduction
- A/C Technology Basic Principles
- Refrigerant R134a
- Refrigerant R134a Characteristics
- Refrigerant Oil
- A/C System Operation
- General Safety Precautions
- A/C System and Refrigerant R134a Safety Precautions
- Refrigerant Circuit, General Precautions
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Introduction
The purpose of this repair manual is to provide service
advisors and technicians with the basic knowledge needed to
ensure professional and competent procedures.
Note
Only the careful study
A/C Technology Basic Principles
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
Refrigerant R134a
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as ref
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Multimedia System Control Head -E380-, Removing and Installing
Multimedia System Control Head -E380-, Removing and Installing, Manual
Transmission
The Multimedia System Control Head -E380- is located in the
center console.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key.
Caution
The surfaces can get scr
Radio Installation Instructions
Retrofitting Radio Systems
General Information
Before installing radios and telephone systems (radio
systems), disconnect the negative terminal of the Battery -A-.
Refer to
→Electrical Equipment; Rep. Gr.27.
Use the applicable wiring diagrams. Refer to
→ Wiring diagrams, Troubleshoo
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